Source: "Four Color" #71
Source: "Batman" #202
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Source: "Fantastic Four" #12, via a late '60s reprint.
Source: "Superman Annual" #4
Source: Rip Hunter story in "Detective Comics" #225
Source: "Captain America" #202. Jack Kirby.
Source: "World's Finest" #223
Source: "Batman" #261
Source: "Detective Comics" #444
Source: "Marvel Premiere" #17. Art: Larry Hama and Dick Giordano.