Mag and Grav
From Author Wars - https://authorwars.com/books/mag-and-grav-130746.html
Overview:
- Title: Mag and Grav
- Author: Leslie Phelps
- Year: 1949
- Type: Essays
Editions/Publications:
- Unknown. Fantastic Adventures, April 1949 (Unknown, Leslie Phelps, Ziff-Davis Publishing Company, $0.25, 156 pages, pulp, MAGAZINE)