The Ultimate Peril

From Author Wars - https://authorwars.com/books/the-ultimate-peril-888324.html

Overview:

Title: The Ultimate Peril
Author: Rod Ruth
Year: 1950
Type: Interior Art

Editions/Publications:

Unknown. Amazing Stories, March 1950 (Unknown, Rod Ruth, Ziff-Davis Publishing Company, $0.25, 196 pages, pulp, MAGAZINE)
Unknown. Space Adventures, Summer 1971 (Unknown, Rod Ruth, Ultimate Publishing Co., Inc., $0.60, 132 pages, digest, MAGAZINE)