Oliver Perry Hay

Anthropologic Scraps: September 10, 1919 (Classic Reprint)

The Fossil Turtles of North America (Classic Reprint)

The Fossil Turtles of North America (Large Text Classic Reprint)

The Pleistocene of North America and Its Vertebrated Animals Form the States East of the Mississippi River and From the Canadian Provinces East of Longitude 95 (Classic Reprint)

The Batrachians and Reptiles of the State of Indiana (Classic Reprint)

The Pleistocene of the Middle Region of North America and Its Vertebrated Animals (Classic Reprint)

Bibliography and Catalogue of the Fossil Vertebrata of North America (Classic Reprint)

Chondrocranium Amphibia: Misc. Papers (Large Text Classic Reprint)

Chondrocranium Amphibia

On the Manner of Locomotion of the Dinosaurs, Especially Diplodocus, With Remarks on the Origin of the Birds (Classic Reprint)

The Batrachians and Reptiles of Indiana - Scholar's Choice Edition

The Fossil Turtles of North America - Scholar's Choice Edition

The Pleistocene of North America and Its Vertebrated Animals Form the States East of the Mississippi River and Form the Canadian Provinces East of Lon

Contributions to the Knowledge of the Mammals of the Pleistocene of North America

Bibliography and Catalogue of the Fossil Vertebrata of North America Volume 179

The Recognition of Pleistocene Faunas

On the Manner of Locomotion of the Dinosaurs, Especially Diplodocus, with Remarks on the Origin of the Birds

A Contribution to the Knowledge of the Extinct Sirenian Desmostylus Hesperus Marsh

On the Structure and Development of the Vertebral Column of Amia

On Certain Portions of the Skeleton of Protostega Gigas

On Some Collections of Fishes Made in the Kankakee and Illinois Rivers

On the Group of Fossil Turtles Known as the Amphichelydia

The Fossil Turtles of North America

The Pleistocene of North America and Its Vertebrated Animals Form the States East of the Mississippi River and Form the Canadian Provinces East of Longitude 95