Analog Fact & Fiction November 1961 (Volume 68, Number 3)
Illustrations by (Roy G.) Krenkel, H. R. van Dongen. Cover by John Schoenherr (for "Gravity Insufficient.")

Short Novel: "No Small Enemy" by Christopher Anvil.

Novelette: "Attrition" by Jim Wannamaker.

Serial: "Sense of Obligation" (Conclusion) by Harry Harrison (book title was Planet of the Damned.)

Feature: "A Problem in Communication" by George O. Smith.

Science: "Gravity Insufficient" by Hal Clement.

John W. Campbell's editorial is "The Origins of Science"; Book reviews by P. Schuyler Miller.