Resolve 14 possible error(s) in volume frus1977-80v15

[WaxCylinderRevival]

Volume: frus1977-80v15 Volume Dates: 1977 to 1980

• [x] https://history.state.gov/historicaldocuments/frus1977-80v15/d326

  • LATER than coverage dates
  • @when value: 1981-01-02
  • Recorded date: January 2, 1981
  • [x] Confirmed correctness of document date

• [ ] https://history.state.gov/historicaldocuments/frus1977-80v15/d457

  • LATER than coverage dates
  • @when value: 1981-01-02
  • Recorded date: January 2, 1981

• [ ] https://history.state.gov/historicaldocuments/frus1977-80v15/d327

  • LATER than coverage dates
  • @when value: 1981-01-10T20:31:00+00:00
  • Recorded date: January 10, 1981, 2031Z

• [ ] https://history.state.gov/historicaldocuments/frus1977-80v15/d344

  • LATER than coverage dates
  • @when value: 1981-01-14
  • Recorded date: January 14, 1981

• [ ] https://history.state.gov/historicaldocuments/frus1977-80v15/d459

  • LATER than coverage dates
  • @when value: 1981-01-14
  • Recorded date: January 14, 1981

• [ ] https://history.state.gov/historicaldocuments/frus1977-80v15/d458

  • LATER than coverage dates
  • @when value: 1981-01-14T01:14:00+00:00
  • Recorded date: January 14, 1981, 0114Z

• [ ] https://history.state.gov/historicaldocuments/frus1977-80v15/d460

  • LATER than coverage dates
  • @when value: 1981-01-15
  • Recorded date: January 15, 1981

• [ ] https://history.state.gov/historicaldocuments/frus1977-80v15/d495

  • LATER than coverage dates
  • @when value: 1981-01-15
  • Recorded date: January 15, 1981

• [ ] https://history.state.gov/historicaldocuments/frus1977-80v15/d328

  • LATER than coverage dates
  • @when value: 1981-01-15T06:18:00+00:00
  • Recorded date: January 15, 1981, 0618Z

• [ ] https://history.state.gov/historicaldocuments/frus1977-80v15/d345

  • LATER than coverage dates
  • @when value: 1981-01-15T22:41:00+00:00
  • Recorded date: January 15, 1981, 2241Z

• [ ] https://history.state.gov/historicaldocuments/frus1977-80v15/d496

  • LATER than coverage dates
  • @when value: 1981-01-16
  • Recorded date: January 16, 1981

• [ ] https://history.state.gov/historicaldocuments/frus1977-80v15/d363

  • LATER than coverage dates
  • @when value: 1981-01-16T19:40:00+00:00
  • Recorded date: January 16, 1981, 1940Z

• [ ] https://history.state.gov/historicaldocuments/frus1977-80v15/d329

  • LATER than coverage dates
  • @when value: 1981-01-18T00:15:00+00:00
  • Recorded date: January 18, 1981, 0015Z

• [x] https://history.state.gov/historicaldocuments/frus1977-80v15/d461

  • LATER than coverage dates
  • @when value: 1981-01-20T17:30:00+00:00
  • Recorded date: January 20, 1981, 1730Z
  • [x] Confirmed correctness of document date

[WaxCylinderRevival]

• [x] Update coverage dates in volume bibliography:

  <coverage type="from">1977</coverage>
  <coverage type="to">1981</coverage>

[WaxCylinderRevival]

• [x] Commit changes: https://github.com/HistoryAtState/frus/commit/9c9fb741cf583d0be51e75d585323ec5a586527e