Autor: R. F. Starzl

R. F. Starzl, Everett C. Smith

Captain S. P. Meek, Harl Vincent, R. F. Starzl, Harry Bates, Ralph Milne Farley

Ray Cummings, Sewell Peaslee Wright, Arthur J. Burks, Charles Willard Diffin, R. F. Starzl

Arthur J. Burks, Murray Leinster, Harl Vincent, Victor Rousseau, Edmond Hamilton, R. F. Starzl, Harold Thompson Rich