Message from the Eocene

From Author Wars - https://authorwars.com/books/message-from-the-eocene-996844.html

Overview:

Title: Message from the Eocene
Author: Jack Gaughan
Year: 1964
Type: Interior Art

Editions/Publications:

Unknown. Message from the Eocene / Three Worlds of Futurity (Unknown, Jack Gaughan, Ace Books, $0.45, 114+142 pages, dos, Omnibus)