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Wikidata: www.wikidata.or ... http://www.wikidata.org/entity/Q1620986
KEEPERS link: catalog.hathitr ... https://catalog.hathitrust.org/Record/000501112
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Wikipedia: de.wikipedia.or ... https://de.wikipedia.org/wiki/Historisches_Jahrbuch
SUDOC: www.sudoc.fr/03 ... http://www.sudoc.fr/038718472
Wikidata: www.wikidata.or ... http://www.wikidata.org/entity/Q1620986
KEEPERS link: catalog.hathitr ... https://catalog.hathitrust.org/Record/000501112
KEEPERS link: catalog.hathitr ... https://catalog.hathitrust.org/Record/008882091
FATCAT: fatcat.wiki/con ... https://fatcat.wiki/container/ufzf7njtc5aanlf2kzklk7s6pu
Google: www.google.com/ ... https://www.google.com/search?q=ISSN+%220018-2621%22
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Pubmed: pubmed.ncbi.nlm ... https://pubmed.ncbi.nlm.nih.gov/?term=%220018-2621%22%5BJournal%5D&sort=