Worlds of If (If, September 1959)

From Author Wars - https://authorwars.com/books/worlds-of-if-if-september-1959-131579.html

Overview:

Title: Worlds of If (If, September 1959)
Author: Frederik Pohl
Year: 1959
Type: Essays
Series: Worlds of If (If)

Editions/Publications:

Unknown. If, September 1959 (Unknown, Frederik Pohl, Digest Productions Corporation; New York, $0.35, 132 pages, digest, MAGAZINE)