Unknown, August 1939

From Author Wars - https://authorwars.com/publications/unknown-august-1939-61844.html

Overview:

Title: Unknown, August 1939
Author: John W. Campbell, Jr.
Year: 1939
Publisher: Street & Smith Publications, Inc.
Price: $0.20
Pages: 164
Binding: pulp
Type: MAGAZINE
Title Reference: The Ghoul (complete novel)
Notes: Vol. I, No. 6 Cover illustration for "The Ghoul" (untitled in the magazine). Interior art by Cartier, Isip, and Kramer.