4 sources Amazing-Man Comics #5 (Sep. 1939): "Origin of Mighty Man"Funny Pages (vol. 1) #6 (Nov. 1936): "Windy" Liberty Scouts Comics #2 (June 1941): "The Fire-Man" Motion Picture Funnies Weekly #1 (Apr. 1939): "Kar Toon and his Copy Cat" | 1 character
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