Analog Science Fiction - Science Fact May 1968 (Volume 81, Number 3)
Illustrations by Kelly Freas (for all but 1 story, and I particularly recommend those for the Vernor Vinge story), Leo R. Summers. Cover by Chesley Bonestell (for "Satan's World.")

Serial: "Satan's World" (Part 1 of 4) by Poul Anderson ("David Falkayn/Van Rijn/Polesotechnic League" series.)

Novelettes: "Conquest by Default" by Vernor Vinge
"Fear Hound" by Katherine MacLean (formed the beginning of Missing Man - but this story by itself is one of my favorites)
"Skysign" by James Blish.

Stories: "Exile to Hell" by Isaac Asimov
"His Master's Vice" by Verge Foray (Howard L. Myers)
"Project Island Bounce" by Lawrence A. Perkins

John W. Campbell's editorial is "Prophecy"; Book reviews by P. Schuyler Miller.