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Permo-Carboniferous Vertebrates From New Mexico (Classic Reprint)

The Permo-Carboniferous Red Beds of North America and Their Vertebrate Fauna (Classic Reprint)

New Reptiles and Stegocephalians from the Upper Triassic of Western Texas (Classic Reprint)

A Revision of the Cotylosauria of North America (Classic Reprint)

The Environment of Vertebrate Life in the Late Paleozoic in North America: A Paleogeographic Study (Classic Reprint)

Revision of the Pelycosauria of North America (Large Text Classic Reprint)

Revision of the Amphibia and Pisces of the Permian of North America

Wisconsin Its Geology and Physical Geography

Wisconsin, Its Geology and Physical Geography: A Popular Account of the Natural Features and Climate of the State for Students and General Readers (Large Text Classic Reprint)

Revision of the Pelycosauria of North America

Revision of the Pelycosauria of North America (Classic Reprint)

New Reptiles and Stegocephalians from the Upper Triassic of Western Texas

Permo-Carboniferous Vertebrates from New Mexico

The Environment of Vertebrate Life in the Late Paleozoic in North America; A Paleogeographic Study

History of the Pelycosauria, with a Description of the Genus Dimetrodon, Cope (Transactions of the American Philosophical Society)

Census of the Determinable Genera of the Stegocephalia (Transactions of the American Philosophical Society)

Morphology of the Skull of the Pelycosaurian Genus Dimetrodon (Transactions of the American Philosophical Society)