Status Update: Internet Archive continues to be offline. As a result, page images are not displaying in BHL.
More information
Psittacosaurus and Protiguanodon : two Lower Cretaceous iguanodonts from Mongolia. American Museum novitates ; no. 127
Central Asiatic Expeditions 1921-1930 Osborn, Henry Fairfield, 1857-1935
Book
1924
English
Find in a local library