Occasionally some bib items are not fetched, e.g.:
fetching ISO 22745-1...
fetching ISO 22745-2...
fetching ISO 22745-13...
Could not retrieve ISO 22745-13: no access to online site
fetching ISO/TS 22745-30...
Could not retrieve ISO/TS 22745-30: no access to online site
fetching ISO/TS 22745-40...
fetching ISO/TS 29002-6...
fetching ISO/TS 29002-10...
fetching ISO/TS 29002-31...
fetching ISO 10303...
fetching ISO/TS 22745-10...
fetching ISO/TS 29002-5...
fetching ISO/IEC 8824-1...
fetching ISO/IEC 19757-3...
Occasionally some bib items are not fetched, e.g.: