X: Yes

From Author Wars - https://authorwars.com/books/x-yes-754617.html

Overview:

Title: X: Yes
Author: Thomas M. Disch
Year: 1969
Type: Short Fiction

Editions/Publications:

Unknown. Fantastic, December 1969 (Unknown, Thomas M. Disch, Ultimate Publishing Co., Inc., $0.60, 148 pages, digest, MAGAZINE)