Comic Title: Mystery in Space #6
Publisher: DC (National Comics Publications, Inc.)
Address: 480 Lexington Avenue, New York, NY
Cover Date: Feb/Mar 1952
On Sale Date: December 12, 1951 Copyright Date December 10, 1951
Source: Library of Congress, Periodicals 1952
Until 1958 DC did not report actual on sale dates to the copyright office
The publication dates listed in LoC records are NOT release dates.

Newsstand Date December 12, 1951
Source: Newsdealer Magazine, V6 #11

Frequency: Bi-monthly
Cover Price: $0.10
Page Count: 32
Editor: Julius Schwartz

Title: "Cowboy on Mars"
Pages: 8

Writer: Manny Rubin
Artist: Jim Mooney