Comic Title: Superman #251
Publisher: DC (National Periodical Publications, Inc.)
Address: 909 Third Avenue, New York, NY
Cover Date: May 1972
On Sale Date: March 16, 1972 Newsstand Date March 16, 1972
Source: House Ad, Flash #215, Page 34

Newsstand Date March 16, 1972
Source: Direct Currents, Flash #215, Page 47

Newsstand Date March 16, 1972
Source: Comic Reader, #82

Copyright Date March 16, 1972
Source: Library of Congress, Periodicals 1972

Frequency: Monthly, (semi-monthly June, Dec.,)
Cover Price: $0.25
Page Count: 48
Editor: Julius Schwartz

Title: "The Day Krypton Didn't Die"
Pages: 8

Feature(s):
World of Krypton

Writer: Elliot S. Maggin
Artist: Rich F. Buckler