Protoceratops andrewsi, a pre-ceratopsian dinosaur from Mongolia, with an appendix on the structural relationships of the Protoceratops beds

W. Granger, and W. K. Gregory

1923

Article

American Museum Novitates 72:1-9

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Taxa discussed in this work:

• Protoceratops
• Protoceratops andrewsi
• Protoceratopsidae