Cover pencils and inks credits from Julius Schwartz's editorial records, provided to the GCD by DC Comics (20 January 2008)
Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics [December 2007].
Copies of DC editorial records credit the pencils and inks to Frank Giacoia. Mark Evanier, Jim Vadeboncoeur, others and myself recognize that Jack Kirby did the pencils on this story. (Gene Reed)