Perpetual Calendar
From Author Wars - https://authorwars.com/books/perpetual-calendar-837325.html
Overview:
- Title: Perpetual Calendar
- Author: uncredited
- Year: 1939
- Type: Essays
Editions/Publications:
- Unknown. Amazing Stories, August 1939 (Unknown, uncredited, Ziff-Davis Publishing Company, $0.20, 148 pages, pulp, MAGAZINE)