Comic Title: Mystery Tales #21
Publisher: Marvel (20th Century Comic Corp.)
Address: 655 Madison Avenue, New York, NY
Cover Date: September 1954
On Sale Date: June 9, 1954 Copyright Date May 19, 1954
Source: Library of Congress, Periodicals 1954

Newsstand Date June 9, 1954
Source: Newsdealer Magazine, V9 #4

Frequency: Bi-monthly
Cover Price: $0.10
Page Count: 32
Editor: Stan Lee

Title: "It Walks Erect"
Pages: 5

Artist: Bob Powell

Reprinted In:
Weird Wonder Tales #7 (1974)
Gorilla Man #1 (2010)
Defenders Omnibus Vol. 2 HC (2023)
Defenders Omnibus Vol. 2 HC [Variant] (2023)