by Donald A. Wollheim
by John Hollis Mason
by Voltaire
by Ray Cummings
by E. E. (Edward Elmer) Smith
by Jules Verne
by E. E. (Edward Elmer) Smith
by Fritz Leiber
by Ralph Milne Farley
by F. L. (Floyd L.) Wallace
by E. K. Jarvis
by Albert Daiber
by George Adamski
by Julian Hawthorne
by H. de (Henry) Graffigny, Georges Le Faure
by Frances Trego Montgomery
by Stephen Marlowe
by Albert Daiber
by H. de (Henry) Graffigny, Georges Le Faure
by H. de (Henry) Graffigny, Georges Le Faure
by H. de (Henry) Graffigny, Georges Le Faure
by Mari Wolf
by Wilson Tucker
by William Tenn
by Friedrich Wilhelm Mader
by Dave Dryfoos
by R. De Witt (Richard De Witt) Miller
by Albert Daiber