Before revision: Companies The Johnson Smith Company placed advertisements for gadgets and toys that appeared on the back cover of many historically significant comic books, including Action Comics #1 , June 1938 (first appearance of the character Superman) and Detective Comics #27 , May 1939 (first appearance of character Batman).
After revision: Companies The Johnson Smith Company placed advertisements for gadgets and toys that appeared on the back cover of many historically significant comic books( including Action Comics #1 ())the June 1938 (first appearance of the character Superman) and Detective Comics #27 , May 1939 (first appearance of character Batman).