Mark X
From Author Wars - https://authorwars.com/books/mark-x-190163.html
Overview:
- Title: Mark X
- Author: John A. Sentry
- Year: 1958
- Type: Short Fiction
Editions/Publications:
- Unknown. Star Science Fiction, January 1958 (Unknown, John A. Sentry, Ballantine Magazines, $0.35, 132 pages, digest, MAGAZINE)