Image sources: Action Comics #1 (1938); Miss Fury #7 (1945); Undercover Girl #5 (1952); Prison Break #3 (1952); Tops Comics (1944); Flash Comics #44 (1943); Sensation Comics #5 (1942); Captain America #156 (1972); Challengers of the Unknown #48 (1966); The Cat #3 (1973)