On-sale date from ad in Challengers of the Unknown #48.
Pencilling and inking credits per Julius Schwartz' editorial records. Inking formerly credited to Murphy Anderson and Bernard Sachs. Lettering credit from reprint in JLA Archives.
Story is told in three chapters, each ending in 2/3 page.
Saladino credit per Nick Caputo. JLA Archives incorrectly credits Joe Letterese. Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics (May 2007).
published in cooperation with the National Social Welfare Assembly
letters submitted by Susan Sheridan; Frank Tower; Scott Taylor; Bill Arundale; Bob Butts; Leonard Tirado