The Seventh Planet

From Author Wars - https://authorwars.com/books/the-seventh-planet-863756.html

Overview:

Title: The Seventh Planet
Author: Schroeder
Year: 1958
Type: Interior Art

Editions/Publications:

Unknown. Amazing Science Fiction Stories, May 1958 (Unknown, Schroeder, Ziff-Davis Publishing Company, $0.35, 148 pages, digest, MAGAZINE)
Unknown. Thrilling Science Fiction, April 1972 (Unknown, Schroeder, Ultimate Publishing Co., Inc., $0.60, 132 pages, digest, MAGAZINE)