Challenge of the Unknown
From Author Wars - https://authorwars.com/books/challenge-of-the-unknown-906262.html
Overview:
- Title: Challenge of the Unknown
- Author: Clark Darlton
- Year: 1973
- Type: Short Fiction
Editions/Publications:
- Unknown. Perry Rhodan #32: Challenge of the Unknown (Unknown, Clark Darlton, Ace Books, $0.75, 160 pages, Paperback, MAGAZINE)
- Unknown. Challenge of the Unknown (Unknown, Clark Darlton, Orbit, ISBN-10: 0708870074, £0.70, 127 pages, Paperback, Chapter Book)