On-sale date from copyright registration.
Pencilling and inking credits per Julius Schwartz's editorial records. Inking formerly credited to Murphy Anderson and Bernard Sachs. Lettering credit from reprint in JLA Archives.
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. Reprint in JLA Archives credits the lettering to Joe Letterese.
Story across 24 pages in three parts of 7.67 pages each.
Snapper Carr is hit with stellaration and becomes the Joker (not the Batman villain) for this story.
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 August issue (#46).