By V. H. H. Green
By Robert Silverberg
By ISAAC ASIMOV
By Maxim Jakubowski
By Chapman Pincher
By Jim Cantwell
By A E Van Vogt
By A. E. Van Vogt
By Charles Sheffield
By John Brunner
By Alan Dean Foster
By J.Neil Schulman
By Paul French
By GREGORY BENFORD
By Robert A. Heinlein
By Sanders, Lawrence
By Forester, C. S.
By Gilman, George G.
By Gilman, G G