Pleistocene of North America and Its Verebrated Animals… References Pleistocene of North America and Its Verebrated Animals… work by Hay Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: Oliver Perry Hay…providing the basis for his Pleistocene of North America and Its Vertebrated Animals… (1923) and two subsequent volumes (1924; 1927). Read More…providing the basis for his Pleistocene of North America and Its Vertebrated Animals… (1923) and two subsequent volumes (1924; 1927). Read More