The Double Planet
From Author Wars - https://authorwars.com/books/the-double-planet-1711848.html
Overview:
- Title: The Double Planet
- Author: Mort Engel
- Year: 1968
- Type: Cover Art
Editions/Publications:
- Unknown. The Double Planet (Unknown, Mort Engel, Pyramid Books, $0.75, 159+[8] pages, Paperback, Non-fiction)