SF Calendar (If, April 1970)

From Author Wars - https://authorwars.com/books/sf-calendar-if-april-1970-597165.html

Overview:

Title: SF Calendar (If, April 1970)
Author: uncredited
Year: 1970
Type: Essays

Editions/Publications:

Unknown. If, April 1970 (Unknown, uncredited, Universal Publishing & Distributing Corporation, $0.60, 164 pages, digest, MAGAZINE)
Unknown. If, May 1970 (UK) (Unknown, uncredited, Universal-Tandem Publishing Company Ltd., 5/-, 164 pages, digest, MAGAZINE)