by Isaac Asimov
by Murray Leinster
by Sam McClatchie
by Robert F. Young
by Lester Del Rey
by L. Ron (La Fayette Ron) Hubbard
by Jeff Sutton
by George O. (George Oliver) Smith
by George H. (George Henry) Smith
by Randall Garrett
by Alfred Coppel
by Allen Kim Lang
by Aaron L. Kolom
by Ivar Jorgensen
by Robert Moore Williams
by Andrew Fetler
by Alfred Coppel
by Fox B. Holden
by Jack Sharkey
by Theodore L. Thomas
by Julian F. Grow
by G. G. Revelle
by Frank Riley
by Kris Neville
by Stephen Marlowe
by Jack Sharkey
by Richard McKenna
by Hayden Howard