Books by Oliver Perry Hay

The United States in Literature [with three long stories] -- Seventh Edition

Second bibliography and catalogue of the fossil Vertebrata of North America

Bibliography and catalogue of the fossil vertebrata of North America

The batrachians and reptiles of the State of Indiana

... On the manner of locomotion of the dinosaurs

The recognition of Pleistocene faunas

The Fossil Turtles of North America

The Batrachians and Reptiles of Indiana

Anthropological scraps

The fossil turtles of North America

The Batrachians and Reptiles of Indiana

Description of a new fossil sea cow from Florida

Descriptions of some fossil vertebrates found in Texas

Descriptions of some Pleistocene vertebrates found in the United States

On the structure and development of the vertebral column of Amia

The Pleistocene of the western region of North America and its vertebrated animals

Second bibliography and catalogue of fossil Vertebrata of North America

Bibliography and Catalogue of the Fossil Vertebrata of North America

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

Pleistocene of the Middle Region of North America and Its Vertebrated Animals

Chondrocranium, Amphibia - Miscellaneous Papers

Recognition of Pleistocene Faunas

On Certain Portions of the Skeleton of Protostega Gigas

A Contribution To The Knowledge Of The Extinct Sirenian Desmostylus Hesperus Marsh