Comic Title: Mystery in Space #12
Publisher: DC (National Comics Publications, Inc.)
Address: 480 Lexington Avenue, New York, NY
Cover Date: Feb/Mar 1953
On Sale Date: December 17, 1952 Copyright Date December 15, 1952
Source: Library of Congress, Periodicals 1953
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 17, 1952
Source: Newsdealer Magazine, V7 #10

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

Title: "The Richest Man on 9 Planets"
Pages: 6

Writer: Jack E. Miller
Penciller: Robert Oksner
Inker: Bernard Sachs