The Magazine of Fantasy and Science Fiction: December 1966 (Volume 31, Number 6)
Cover by Howard Purcell (for "Bumberboom.")

Novelets: "Sabotage" by Christopher Anvil
"Bumberboom" by Avram Davidson

Stories: "The Mystery of the Purloined Grenouilles" by Gerard Jonas
"Doubting Thomas" by Thomas M. Disch
"Von Goom's Gambit" by Victor Contoski [I highly recommend this!]
"The Green Snow" by Miriam Allen DeFord

Science: "The Martian Atmosphere" by Ted Thomas
"The Symbol-Minded Chemist" by Isaac Asimov.

Joseph W. Ferman is Publisher, Edward L. Ferman is Editor, Ted White is assistant Editor, and Robert P. Mills is Consulting Editor. Book Reviews by Judith Merril; (verse) "The Gods" by L. Sprague de Camp; cartoon by Gahan Wilson.