On-sale date from copyright registration.
Inside front cover. Published in cooperation with the National Social Welfare Assembly.
Previously appeared in DC comics cover-dated May 1959.
Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics.
Story across 24 pages in three parts of 7.67, 9.67, and 5.67 pages.
gags about scientific facts
Statement of October 1, 1965
No circulation information given.
Owners: National Periodical Publications, Inc., Estate of Harry Donenfeld, J. S. Liebowitz, P. H. Sampliner, Irwin Donenfeld, S. U. Sampliner, Sonia Iger, all at 575 Lexington Ave, New York, N.Y., 10022
Revised statement including circulation numbers appears in the July issue (#46).
letters submitted by Rand B. Lee; Mike Flasher; Leonard Tirado