Autor: Arthur L. Zagat

Ray Cummings, Jack Williamson, Harry Bates, Harold Thompson Rich, Nat Schachner, Arthur L. Zagat, A. R. Holmes

Ray Cummings, Captain S. P. Meek, Hal K. Wells, Charles Willard Diffin, Nat Schachner, Arthur L. Zagat

Arthur L. Zagat