The Cube

From Author Wars - https://authorwars.com/books/the-cube-772877.html

Overview:

Title: The Cube
Author: Gaughan
Year: 1970
Type: Interior Art

Editions/Publications:

Unknown. Worlds of If, February 1970 (Unknown, Gaughan, Universal Publishing & Distributing Corporation, $0.60, 164 pages, digest, MAGAZINE)
Unknown. If, March 1970 (UK) (Unknown, Gaughan, Universal-Tandem Publishing Company Ltd., 5/-, 164 pages, digest, MAGAZINE)