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Wikipedia: en.wikipedia.or ... https://en.wikipedia.org/wiki/Acta_Geologica_Polonica
Wikipedia: pl.wikipedia.or ... https://pl.wikipedia.org/wiki/Acta_Geologica_Polonica
SUDOC: www.sudoc.fr/03 ... http://www.sudoc.fr/038656698
Wikidata: www.wikidata.or ... http://www.wikidata.org/entity/Q11684227
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