Biodiversity Heritage Library mailto:biodiversitylibrary@gmail.com Ueber die Foraminiferen des Böhmischen Cenomans / Jaroslav Perner Perner, Jaroslav, 1869- creator text book Harvard University, Museum of Comparative Zoology, Ernst Mayr Library Prague 1892 1892
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 GER Bohemia (Czech Republic) Cretaceous Foraminifera Paleontology Museum of Comparative Zoology--Biodiversity Heritage Library digitization project https://www.biodiversitylibrary.org/item/51448 181159537 10.5962/bhl.title.14882 Harvard University, Museum of Comparative Zoology, Ernst Mayr Library https://www.biodiversitylibrary.org/item/51448 https://www.biodiversitylibrary.org/pagethumb/14859919 Public domain. The BHL considers that this work is no longer under copyright protection. HMZ