On-sale date from ad in Batman #187 and copyright registration.
Inside front cover.
Credits for script, pencils, inks and letters confirmed from Julius Schwartz's editorial records, provided by DC Comics. Schwartz kept editorial records for Robert Kanigher, who edited this issue.
Story in two parts: Part One (5.67 pp.) & Part Two (5.67 pp.).
Letters from Iver Laughlin, Johnny Rakes, Mary S. Lane, Mike Sullivan, Mark Keighley.
Idea from Eddie Lawless, Indianapolis, Ind.