Astounding Science Fiction August 1959 (Volume 63, Number 6 - wrongly noted as Volume "LXIV")
Illustrations by H. R. van Dongen, Martinez, Leo R. Summers, Kelly Freas, Bernklau. Cover by H. R. van Dongen (for "The Aliens.")

Novelettes: "The Aliens" by Murray Leinster
"The Outsiders" by A. Bertram Chandler (a "Derek Calver/Rim" story; later expanded to The Ship From Outside)
"Familiar Pattern" by George Whitley (A. Bertram Chandler.)

Stories: "Dead Giveaway" by Randall Garrett
"A Matter of Proportion" by Anne Walker
"Day of Succession" by Theodore L. Thomas.

Article: "Space for Madness" by Kenneth Johns.

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