Astounding Science Fiction September 1956 (Volume 58, Number 1)
Illustrations by Kelly Freas H. R. van Dongen. Cover by Kelly Freas (for "Pandora's Planet.")

Novelettes: "Pandora's Planet" by Christopher Anvil
"The Swamp was Upside Down" by Murray Leinster (incorporated into fix-up Colonial Survey, a.k.a. The Planet Explorer.)

Stories: "Margin of Profit" by Poul Anderson (a "Nicholas van Rijn" story)
"Dust Rag" by Hal Clement
"Mind for Business" by Robert Silverberg.

Special Feature: "Pate de Foie Gras" by Isaac Asimov.

John W. Campbell's editorial is "I Try to Have an Open Mind"; Book reviews by P. Schuyler Miller.