Perry Rhodan #85: Enemy in the Dark

From Author Wars - https://authorwars.com/publications/perry-rhodan-85-enemy-in-the-dark-265915.html

Overview:

Title: Perry Rhodan #85: Enemy in the Dark
Author: Forrest J. Ackerman, Pat LoBrutto
Year: 1975
Publisher: Ace Books
Price: $1.25
Pages: 212
Binding: Paperback
Type: MAGAZINE
Title Reference: Star Level
Notes:
- "First Ace printing: December 1975", no number line
- The artist is not credited, the artwork is clearly signed
- Interior artwork is not credited or signed