Biodiversity Heritage Library mailto:biodiversitylibrary@gmail.com Measurements of birds Brewster, William, 1851-1919 creator text book Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
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 ENG 1851-1919 Birds Brewster, William, New England Museum of Comparative Zoology--Biodiversity Heritage Library digitization project https://www.biodiversitylibrary.org/item/250265 969680060 10.5962/bhl.title.148910 Harvard University, Museum of Comparative Zoology, Ernst Mayr Library https://www.biodiversitylibrary.org/item/250265 https://www.biodiversitylibrary.org/pagethumb/55965113 Public domain. The BHL considers that this work is no longer under copyright protection.