in Superman (Egmont Ehapa, 1966 series) #7/1969 (5.April 1969)
in Showcase Presents Batman (DC, 2006 series) #4 ([July] 2009)Credits for pencils and inks (not layouts) confirmed from Julius Schwartz's editorial records, provided by DC Comics (added by Gregory Fischer, May 2009).
in Superman (Egmont Ehapa, 1966 series) #7/1969 (5.April 1969)
in Lynvingen (Williams Forlag, 1969 series) #7/1969 ([juli] 1969)
in Showcase Presents Batman (DC, 2006 series) #4 ([July] 2009)Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics.
Story continues in Detective Comics #383. Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics.
Letters of comment from Rand B. Lee, Steven Carlberg and Gary Skinner.