Pendulum
From Author Wars - https://authorwars.com/books/pendulum-899058.html
Editions/Publications:
- Unknown. Famous Fantastic Mysteries Combined with Fantastic Novels Magazine, June 1953 (Unknown, Lawrence, Popular Publications, Inc., $0.25, 116 pages, pulp, MAGAZINE)
- Unknown. 2000 A.D.: Illustrations from the Golden Age of Science Fiction Pulps (Unknown, Lawrence, Henry Regnery, ISBN-10: 0809281171, $7.95, 176 pages, Trade Paperback, Non-fiction)