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Osborn, Henry Fairfield; Mook, Charles Craig. “Camarasaurus, Amphicoelias, and other sauropods of Cope,” in: Memoirs of the American Museum of Natural History, new series, vol. 3 (1921). Illustration by Erwin Christman

Osborn, Henry Fairfield; Mook, Charles Craig. “Camarasaurus, Amphicoelias, and other sauropods of Cope,” in: Memoirs of the American Museum of Natural History, new series, vol. 3 (1921). Illustration by Erwin Christman

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