Unknown, September 1939

From Author Wars - https://authorwars.com/publications/unknown-september-1939-61853.html

Overview:

Title: Unknown, September 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 Coppersmith
Notes: Vol II, No 1. Table of contents credits interior art to Cartier, Isip, Kramer, Orban and Schneeman. The two works credited to "Isip" only have been identified in this record as either M. Isip or R. Isip based a visible artist's signature.