Protoceratops andrewsi, a pre-ceratopsian dinosaur from Mongolia. American Museum novitates ; no.72
Berkey, Charles Peter, 1867-1955 Central Asiatic Expeditions 1921-1930 Granger, Walter, 1872-1941 Gregory, William K. (William King), 1876-1970
Book
1923
English
Wikidata: https://www.wikidata.org/entity/Q51523178
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