Millions of years ago
Subtitle: prehistoric life in North America
By: by Edwin H. Colbert ; illustrated by Margaret M. Colbert.
Publisher: Crowell
Published: 1958
Place of publication: New York
Language: eng
Number of pages: 153
Subjects: Paleontology -- North America.
Description: Describes life in the days of the early fishes, of the ancient land dwellers, of the dinosaurs and of the mammals. Tells how the fossil hunter goes about his work and interprets his findings.
Notes: Includes index.