Hawkman (1964-) #6

“THE WORLD WHERE EVOLUTION RAN WILD!” After a strange force causes them to devolve temporarily into cavemen, the Hawks discover the parallel world of Illoral, inhabited by tiger-men and flying gorillas.

Written By:
Gardner Fox, Jack Schiff, Julius Schwartz
Pencils:
Murphy Anderson, Morris Waldinger, Win Mortimer
Inks:
Murphy Anderson, Tommy Nicolosi, Win Mortimer
Cover By:
Murphy Anderson