The on-sale date is the publication date reported in the U. S. Copyright Office filing. It is also given as the on-sale date in a house ad in Justice League of America #80.
Includes letters from David Blehar, Joseph Carroll, Ilona Johnson, Russell Taylor, and Jerry Wilson.
Uncredited Cain head on the top of page one.
Judy was modeled after Neal Adams' daughter Kris Adams. (Note corrected by Zeea (Adams) Moss via the GCD Errors list.)
Kanigher script per bio info from Robin Snyder's History of the Comics #v4#7 (July 1993). Previous indexer credited Jack Oleck, who is credited as authoring this story in the reprint in Welcome Back to the House of Mystery (DC, 1998 series) #1.