The Double Invaders

From Author Wars - https://authorwars.com/books/the-double-invaders-143606.html

Overview:

Title: The Double Invaders
Author: Ermoyan
Year: 1967
Type: Cover Art

Editions/Publications:

Unknown. These Savage Futurians / The Double Invaders (Unknown, Ermoyan, Ace Books, $0.50, 120+134 pages, dos, Omnibus)