The Story of Our Earth: The Coming of the Dinosaurs
From Author Wars - https://authorwars.com/books/the-story-of-our-earth-the-coming-of-the-dinosaurs-117300.html
Overview:
Editions/Publications:
- Unknown. Worlds of If, January 1970 (Unknown, Willy Ley, Universal Publishing & Distributing Corporation, $0.60, 164 pages, digest, MAGAZINE)
- Unknown. If, February 1970 (UK) (Unknown, Willy Ley, Universal-Tandem Publishing Company Ltd., 5/-, 164 pages, digest, MAGAZINE)