I found duplications missing a link and a date in one of the rows. It looks like we should drop the row with missing data. I just put these cases here for information.
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22.135,Multicall; Service description; Stage 1,,4.2.0,,1,Miettinen,Natalia,NOKIA UK R&D Ltd,S1, ,Release 4,GSM_Release_4,3G_Rel-4,SA-#11,SA-#11,SA-#11,SA#65,Aug 1 1998 12:00AM,Jun 21 2001 12:00AM
22.135,Multicall; Service description; Stage 1,https://www.3gpp.org/ftp/Specs/archive/22_series/22.135/22135-420.zip,4.2.0,Dec 18 2002 12:00AM,1,Miettinen,Natalia,NOKIA UK R&D Ltd,S1, ,Release 4,GSM_Release_4,3G_Rel-4,SA-#11,SA-#11,SA-#11,SA#65,Aug 1 1998 12:00AM,Jun 21 2001 12:00AM
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23.078,Customised Applications for Mobile network Enhanced Logic (CAMEL) Phase 4; Stage 2,,4.5.0,,1,Wiehe,Ulrich,Nokia Solutions and Networks (shanghai) Ltd.,C4, ,Release 4,GSM_Release_4,3G_Rel-4,SA-#11,SA-#11,SA-#11,SA#65,Aug 1 1998 12:00AM,Jun 21 2001 12:00AM
23.078,Customised Applications for Mobile network Enhanced Logic (CAMEL) Phase 4; Stage 2,https://www.3gpp.org/ftp/Specs/archive/23_series/23.078/23078-450.zip,4.5.0,Jun 17 2002 12:00AM,1,Wiehe,Ulrich,Nokia Solutions and Networks (shanghai) Ltd.,C4, ,Release 4,GSM_Release_4,3G_Rel-4,SA-#11,SA-#11,SA-#11,SA#65,Aug 1 1998 12:00AM,Jun 21 2001 12:00AM
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23.882,3GPP system architecture evolution (SAE): Report on technical options and conclusions,,0.3.0,,0,Pudney,Chris,Vodafone Group Plc,S2, ,Release 7,GSM_Release_7,3G_Rel-7,SA#29,SA#33,SA#35,SA#65,Oct 6 2003 12:00AM,Mar 13 2008 1:00PM
23.882,3GPP system architecture evolution (SAE): Report on technical options and conclusions,https://www.3gpp.org/ftp/Specs/archive/23_series/23.882/23882-030.zip,0.3.0,Jul 26 2005 12:00AM,0,Pudney,Chris,Vodafone Group Plc,S2, ,Release 7,GSM_Release_7,3G_Rel-7,SA#29,SA#33,SA#35,SA#65,Oct 6 2003 12:00AM,Mar 13 2008 1:00PM
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24.228,Signalling flows for the IP multimedia call control based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3,,1.0.0,,1,Mayer,Georg,"HuaWei Technologies Co., Ltd",C1, ,Release 5,GSM_Release_5,3G_Rel-5,SA-#15,SA-#15,SA-#15,SA#65,May 1 2000 12:00AM,Sep 12 2002 5:00PM
24.228,Signalling flows for the IP multimedia call control based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3,https://www.3gpp.org/ftp/Specs/archive/24_series/24.228/24228-100.zip,1.0.0,Jun 26 2001 12:00AM,1,Mayer,Georg,"HuaWei Technologies Co., Ltd",C1, ,Release 5,GSM_Release_5,3G_Rel-5,SA-#15,SA-#15,SA-#15,SA#65,May 1 2000 12:00AM,Sep 12 2002 5:00PM
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24.605,Conference (CONF) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification,,2.6.0,,1,Ji,Mengdi,Huawei Technologies France,C1, ,Release 8,GSM_Release_8,3G_Rel-8,SA#38,SA#40,SA#42,,Jan 23 2006 12:00AM,Mar 12 2009 1:00PM
24.605,Conference (CONF) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification,https://www.3gpp.org/ftp/Specs/archive/24_series/24.605/24605-260.zip,2.6.0,Feb 8 2008 12:00AM,1,Ji,Mengdi,Huawei Technologies France,C1, ,Release 8,GSM_Release_8,3G_Rel-8,SA#38,SA#40,SA#42,,Jan 23 2006 12:00AM,Mar 12 2009 1:00PM
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25.331,Radio Resource Control (RRC); Protocol specification,,6.0.0,,1,Shreevastav,Ritesh,Ericsson India Private Limited,RP,R2,Release 6,GSM_Release_6,3G_Rel-6,SA#26,SA#26,SA#27,SA#65,Mar 28 2000 12:00AM,Sep 28 2005 1:00PM
25.331,Radio Resource Control (RRC); Protocol specification,https://www.3gpp.org/ftp/Specs/archive/25_series/25.331/25331-600.zip,6.0.0,Jan 12 2004 12:00AM,1,Shreevastav,Ritesh,Ericsson India Private Limited,RP,R2,Release 6,GSM_Release_6,3G_Rel-6,SA#26,SA#26,SA#27,SA#65,Mar 28 2000 12:00AM,Sep 28 2005 1:00PM
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25.809,7.68 Mcps TDD option: Physical layer,,0.5.2,,0,Beale,Martin,Waiting for new Company,RP,R1,Release 7,GSM_Release_7,3G_Rel-7,SA#29,SA#33,SA#35,SA#65,Oct 6 2003 12:00AM,Mar 13 2008 1:00PM
25.809,7.68 Mcps TDD option: Physical layer,https://www.3gpp.org/ftp/Specs/archive/25_series/25.809/25809-052.zip,0.5.2,Nov 21 2005 12:00AM,0,Beale,Martin,Waiting for new Company,RP,R1,Release 7,GSM_Release_7,3G_Rel-7,SA#29,SA#33,SA#35,SA#65,Oct 6 2003 12:00AM,Mar 13 2008 1:00PM
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25.880,Re-arrangement of Iub transport bearers,,0.3.0,,0,Hautala,Jari,Nokia Corporation,R3, ,Release 5,GSM_Release_5,3G_Rel-5,SA-#15,SA-#15,SA-#15,SA#65,May 1 2000 12:00AM,Sep 12 2002 5:00PM
25.880,Re-arrangement of Iub transport bearers,https://www.3gpp.org/ftp/Specs/archive/25_series/25.880/25880-030.zip,0.3.0,Jan 11 2002 12:00AM,0,Hautala,Jari,Nokia Corporation,R3, ,Release 5,GSM_Release_5,3G_Rel-5,SA-#15,SA-#15,SA-#15,SA#65,May 1 2000 12:00AM,Sep 12 2002 5:00PM
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29.230,Diameter applications; 3GPP specific codes and identifiers,,12.0.0,,1,Wiehe,Ulrich,Nokia Solutions and Networks (shanghai) Ltd.,C4, ,Release 12,GSM_Release_12,3G4G_Rel-12,SA#59,SA#62,SA#65,,Jun 26 2011 12:00AM,Mar 13 2015 5:00PM
29.230,Diameter applications; 3GPP specific codes and identifiers,https://www.3gpp.org/ftp/Specs/archive/29_series/29.230/29230-c00.zip,12.0.0,Mar 13 2013 12:00AM,1,Wiehe,Ulrich,Nokia Solutions and Networks (shanghai) Ltd.,C4, ,Release 12,GSM_Release_12,3G4G_Rel-12,SA#59,SA#62,SA#65,,Jun 26 2011 12:00AM,Mar 13 2015 5:00PM
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29.817,Study on eXtensible Markup Language (XML) based access of the Application Function (AF) to the Policy and Charging Rules Function (PCRF),,1.0.0,,0,Brinkmann,Horst,Alcatel-Lucent Deutschland AG,C3, ,Release 12,GSM_Release_12,3G4G_Rel-12,SA#59,SA#62,SA#65,,Jun 26 2011 12:00AM,Mar 13 2015 5:00PM
29.817,Study on eXtensible Markup Language (XML) based access of the Application Function (AF) to the Policy and Charging Rules Function (PCRF),https://www.3gpp.org/ftp/Specs/archive/29_series/29.817/29817-100.zip,1.0.0,Dec 16 2013 12:00AM,0,Brinkmann,Horst,Alcatel-Lucent Deutschland AG,C3, ,Release 12,GSM_Release_12,3G4G_Rel-12,SA#59,SA#62,SA#65,,Jun 26 2011 12:00AM,Mar 13 2015 5:00PM
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31.103,Characteristics of the IP Multimedia Services Identity Module (ISIM) application,,7.0.0,,1,Phan,Ly Thanh,Gemalto N.V.,C6, ,Release 7,GSM_Release_7,3G_Rel-7,SA#29,SA#33,SA#35,SA#65,Oct 6 2003 12:00AM,Mar 13 2008 1:00PM
31.103,Characteristics of the IP Multimedia Services Identity Module (ISIM) application,https://www.3gpp.org/ftp/Specs/archive/31_series/31.103/31103-700.zip,7.0.0,Jun 12 2006 12:00AM,1,Phan,Ly Thanh,Gemalto N.V.,C6, ,Release 7,GSM_Release_7,3G_Rel-7,SA#29,SA#33,SA#35,SA#65,Oct 6 2003 12:00AM,Mar 13 2008 1:00PM
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32.766,Telecommunication management; Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Network Resource Model (NRM) Integration Reference Point (IRP); Solution Set (SS) definitions,,10.8.0,,1,Zou,Lan,"Huawei Technologies (UK) Co., Ltd.",S5, ,Release 10,GSM_Release_10,3G4G_Rel-10,SA#47,SA#49,SA#51,,Jan 20 2009 12:00AM,Jun 8 2011 5:30PM
32.766,Telecommunication management; Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Network Resource Model (NRM) Integration Reference Point (IRP); Solution Set (SS) definitions,https://www.3gpp.org/ftp/Specs/archive/32_series/32.766/32766-a80.zip,10.8.0,Mar 17 2014 12:00AM,1,Zou,Lan,"Huawei Technologies (UK) Co., Ltd.",S5, ,Release 10,GSM_Release_10,3G4G_Rel-10,SA#47,SA#49,SA#51,,Jan 20 2009 12:00AM,Jun 8 2011 5:30PM
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33.21U,Security requirements,,3.0.0,,1,Bergmann,Ansgar,Hillebrand Consulting Engineers GmbH,, ,UMTS,,,SMG-#28,SMG-#28,SMG-#28,SA#28,Aug 18 1994 12:00AM,Feb 12 1999 12:00AM
33.21U,Security requirements,https://www.3gpp.org/ftp/Specs/archive/33_series/33.21U/3321U-300.zip,3.0.0,Feb 21 1999 12:00AM,1,Bergmann,Ansgar,Hillebrand Consulting Engineers GmbH,, ,UMTS,,,SMG-#28,SMG-#28,SMG-#28,SA#28,Aug 18 1994 12:00AM,Feb 12 1999 12:00AM
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33.816,Feasibility study on LTE relay node security,,2.0.0,,0,Escott,Adrian,Qualcomm Germany GmbH,S3, ,Release 11,GSM_Release_11,3G4G_Rel-11,SA#53,SA#55,SA#57,,Jan 22 2010 12:00AM,Mar 6 2013 5:30PM
33.816,Feasibility study on LTE relay node security,https://www.3gpp.org/ftp/Specs/archive/33_series/33.816/33816-200.zip,2.0.0,Mar 28 2011 9:44AM,0,Escott,Adrian,Qualcomm Germany GmbH,S3, ,Release 11,GSM_Release_11,3G4G_Rel-11,SA#53,SA#55,SA#57,,Jan 22 2010 12:00AM,Mar 6 2013 5:30PM
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36.836,Evolved Universal Terrestrial Radio Access (E-UTRA); Study on mobile relay,,12.0.0,,0,Hu,Haijing,China Academy of Telecommunication Technology - (Datang Telecom Technology and Industry Group),R3, ,Release 12,GSM_Release_12,3G4G_Rel-12,SA#59,SA#62,SA#65,,Jun 26 2011 12:00AM,Mar 13 2015 5:00PM
36.836,Evolved Universal Terrestrial Radio Access (E-UTRA); Study on mobile relay,https://www.3gpp.org/ftp/Specs/archive/36_series/36.836/36836-c00.zip,12.0.0,Jun 27 2014 12:00AM,0,Hu,Haijing,China Academy of Telecommunication Technology - (Datang Telecom Technology and Industry Group),R3, ,Release 12,GSM_Release_12,3G4G_Rel-12,SA#59,SA#62,SA#65,,Jun 26 2011 12:00AM,Mar 13 2015 5:00PM
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36.851,Inter-band carrier aggregation,,0.12.0,,0,Khan,Asif Ali,Ericsson Telefonaktiebolaget LM,R4, ,Release 12,GSM_Release_12,3G4G_Rel-12,SA#59,SA#62,SA#65,,Jun 26 2011 12:00AM,Mar 13 2015 5:00PM
36.851,Inter-band carrier aggregation,https://www.3gpp.org/ftp/Specs/archive/36_series/36.851/36851-0c0.zip,0.12.0,Sep 29 2014 12:00AM,0,Khan,Asif Ali,Ericsson Telefonaktiebolaget LM,R4, ,Release 12,GSM_Release_12,3G4G_Rel-12,SA#59,SA#62,SA#65,,Jun 26 2011 12:00AM,Mar 13 2015 5:00PM
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36.851,Inter-band carrier aggregation,,0.4.0,,0,Khan,Asif Ali,Ericsson Telefonaktiebolaget LM,R4, ,Release 12,GSM_Release_12,3G4G_Rel-12,SA#59,SA#62,SA#65,,Jun 26 2011 12:00AM,Mar 13 2015 5:00PM
36.851,Inter-band carrier aggregation,https://www.3gpp.org/ftp/Specs/archive/36_series/36.851/36851-040.zip,0.4.0,Apr 25 2013 12:00AM,0,Khan,Asif Ali,Ericsson Telefonaktiebolaget LM,R4, ,Release 12,GSM_Release_12,3G4G_Rel-12,SA#59,SA#62,SA#65,,Jun 26 2011 12:00AM,Mar 13 2015 5:00PM
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37.902,Measurements of User Equipment (UE) radio performances for LTE/UMTS terminals; Total Radiated Power (TRP) and Total Radiated Sensitivity (TRS) test methodology,,12.0.0,,0,An,Xudong,CATR,R4, ,Release 12,GSM_Release_12,3G4G_Rel-12,SA#59,SA#62,SA#65,,Jun 26 2011 12:00AM,Mar 13 2015 5:00PM
37.902,Measurements of User Equipment (UE) radio performances for LTE/UMTS terminals; Total Radiated Power (TRP) and Total Radiated Sensitivity (TRS) test methodology,https://www.3gpp.org/ftp/Specs/archive/37_series/37.902/37902-c00.zip,12.0.0,Oct 3 2014 12:00AM,0,An,Xudong,CATR,R4, ,Release 12,GSM_Release_12,3G4G_Rel-12,SA#59,SA#62,SA#65,,Jun 26 2011 12:00AM,Mar 13 2015 5:00PM
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43.020,Security related network functions,,10.2.0,,1,Sahlin,Bengt,Ericsson Telefonaktiebolaget LM,S3,"RP, CP",Release 10,GSM_Release_10,3G4G_Rel-10,SA#47,SA#49,SA#51,,Jan 20 2009 12:00AM,Jun 8 2011 5:30PM
43.020,Security related network functions,https://www.3gpp.org/ftp/Specs/archive/43_series/43.020/43020-a20.zip,10.2.0,Jun 27 2014 12:00AM,1,Sahlin,Bengt,Ericsson Telefonaktiebolaget LM,S3,"RP, CP",Release 10,GSM_Release_10,3G4G_Rel-10,SA#47,SA#49,SA#51,,Jan 20 2009 12:00AM,Jun 8 2011 5:30PM
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43.020,Security related network functions,,11.2.0,,1,Sahlin,Bengt,Ericsson Telefonaktiebolaget LM,S3,"RP, CP",Release 11,GSM_Release_11,3G4G_Rel-11,SA#53,SA#55,SA#57,,Jan 22 2010 12:00AM,Mar 6 2013 5:30PM
43.020,Security related network functions,https://www.3gpp.org/ftp/Specs/archive/43_series/43.020/43020-b20.zip,11.2.0,Jun 27 2014 12:00AM,1,Sahlin,Bengt,Ericsson Telefonaktiebolaget LM,S3,"RP, CP",Release 11,GSM_Release_11,3G4G_Rel-11,SA#53,SA#55,SA#57,,Jan 22 2010 12:00AM,Mar 6 2013 5:30PM
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43.020,Security related network functions,,12.1.0,,1,Sahlin,Bengt,Ericsson Telefonaktiebolaget LM,S3,"RP, CP",Release 12,GSM_Release_12,3G4G_Rel-12,SA#59,SA#62,SA#65,,Jun 26 2011 12:00AM,Mar 13 2015 5:00PM
43.020,Security related network functions,https://www.3gpp.org/ftp/Specs/archive/43_series/43.020/43020-c10.zip,12.1.0,Jun 27 2014 12:00AM,1,Sahlin,Bengt,Ericsson Telefonaktiebolaget LM,S3,"RP, CP",Release 12,GSM_Release_12,3G4G_Rel-12,SA#59,SA#62,SA#65,,Jun 26 2011 12:00AM,Mar 13 2015 5:00PM
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43.020,Security related network functions,,9.2.0,,1,Sahlin,Bengt,Ericsson Telefonaktiebolaget LM,S3,"RP, CP",Release 9,GSM_Release_9,3G_Rel-9,SA#42,SA#44,SA#46,,Mar 6 2008 12:00AM,Mar 25 2010 1:00PM
43.020,Security related network functions,https://www.3gpp.org/ftp/Specs/archive/43_series/43.020/43020-920.zip,9.2.0,Jun 27 2014 12:00AM,1,Sahlin,Bengt,Ericsson Telefonaktiebolaget LM,S3,"RP, CP",Release 9,GSM_Release_9,3G_Rel-9,SA#42,SA#44,SA#46,,Mar 6 2008 12:00AM,Mar 25 2010 1:00PM
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51.010-1,Mobile Station (MS) conformance specification; Part 1: Conformance specification,,5.4.0,,1,Lascoux,Remi,"Sierra Wireless, S.A.",R5,"S1, CP",Release 5,GSM_Release_5,3G_Rel-5,SA-#15,SA-#15,SA-#15,SA#65,May 1 2000 12:00AM,Sep 12 2002 5:00PM
51.010-1,Mobile Station (MS) conformance specification; Part 1: Conformance specification,https://www.3gpp.org/ftp/Specs/archive/51_series/51.010-1/51010-1-540.zip,5.4.0,Jul 22 2003 12:00AM,1,Lascoux,Remi,"Sierra Wireless, S.A.",R5,"S1, CP",Release 5,GSM_Release_5,3G_Rel-5,SA-#15,SA-#15,SA-#15,SA#65,May 1 2000 12:00AM,Sep 12 2002 5:00PM
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51.010-2,Mobile Station (MS) conformance specification; Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification,,5.4.0,,1,Lascoux,Remi,"Sierra Wireless, S.A.",R5,"S1, CP",Release 5,GSM_Release_5,3G_Rel-5,SA-#15,SA-#15,SA-#15,SA#65,May 1 2000 12:00AM,Sep 12 2002 5:00PM
51.010-2,Mobile Station (MS) conformance specification; Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification,https://www.3gpp.org/ftp/Specs/archive/51_series/51.010-2/51010-2-540.zip,5.4.0,Jul 17 2003 12:00AM,1,Lascoux,Remi,"Sierra Wireless, S.A.",R5,"S1, CP",Release 5,GSM_Release_5,3G_Rel-5,SA-#15,SA-#15,SA-#15,SA#65,May 1 2000 12:00AM,Sep 12 2002 5:00PM
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This duplication has one document without date and another with incorrect link:
29.812,Study on SCC AS Restoration,https://www.3gpp.org/ftp/Specs/archive/29_series/29.812/29812-010.zip,0.1.0,,0,Du,Xiaoning,China Academy of Telecommunication Research of MIIT,C4, ,Release 13,GSM_Release_13,3G4G_Rel-13,SA#65,SA#68,SA#70,,Sep 30 2012 12:00AM,Mar 11 2016 5:00PM
29.812,Study on SCC AS Restoration,https://www.3gpp.org/ftpSpecs/archive/29_series/29.812/29812-010.zip,0.1.0,Jun 25 2015 6:18AM,0,Du,Xiaoning,China Academy of Telecommunication Research of MIIT,C4, ,Release 13,GSM_Release_13,3G4G_Rel-13,SA#65,SA#68,SA#70,,Sep 30 2012 12:00AM,Mar 11 2016 5:00PM
These duplications are completely identical
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25.813,Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Radio interface protocol aspects,https://www.3gpp.org/ftp/Specs/archive/25_series/25.813/25813-030.zip,0.3.0,Jan 18 2006 9:35AM,0,SEBIRE,Benoist,Nokia Solutions and Networks GmbH & Co. KG,RP,R2,Release 7,GSM_Release_7,3G_Rel-7,SA#29,SA#33,SA#35,SA#65,Oct 6 2003 12:00AM,Mar 13 2008 1:00PM
25.813,Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Radio interface protocol aspects,https://www.3gpp.org/ftp/Specs/archive/25_series/25.813/25813-030.zip,0.3.0,Jan 18 2006 12:00AM,0,SEBIRE,Benoist,Nokia Solutions and Networks GmbH & Co. KG,RP,R2,Release 7,GSM_Release_7,3G_Rel-7,SA#29,SA#33,SA#35,SA#65,Oct 6 2003 12:00AM,Mar 13 2008 1:00PM
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29.935,Study on User Data Convergence (UDC) data model,https://www.3gpp.org/ftp/Specs/archive/29_series/29.935/29935-010.zip,0.1.0,Jul 21 2010 10:12AM,0,Ficaccio,Mauro,Telecom Italia S.p.A.,C4, ,Release 10,GSM_Release_10,3G4G_Rel-10,SA#47,SA#49,SA#51,,Jan 20 2009 12:00AM,Jun 8 2011 5:30PM
29.935,Study on User Data Convergence (UDC) data model,https://www.3gpp.org/ftp/Specs/archive/29_series/29.935/29935-010.zip,0.1.0,Jul 21 2010 12:00AM,0,Ficaccio,Mauro,Telecom Italia S.p.A.,C4, ,Release 10,GSM_Release_10,3G4G_Rel-10,SA#47,SA#49,SA#51,,Jan 20 2009 12:00AM,Jun 8 2011 5:30PM
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I found duplications missing a link and a date in one of the rows. It looks like we should drop the row with missing data. I just put these cases here for information.
This duplication has one document without date and another with incorrect link:
These duplications are completely identical