Comic Title: Mystery in Space #31
Publisher: DC (National Comics Publications, Inc.)
Address: 480 Lexington Avenue, New York, NY
Cover Date: Apr/May 1956
Approx. On Sale Date: February 14, 1956 Copyright Date February 12, 1956
Source: Library of Congress, Periodicals 1956
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.

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

Title: "The Day the Earth Split in Two"
Pages: 6

Writer: John Broome
Penciller: Sid Greene
Inker: Bernard Sachs

Reprinted In:
Strange Adventures #228 (1971)