Wormholes and Time Machines
From Author Wars - https://authorwars.com/books/wormholes-and-time-machines-114919.html
Overview:
- Title: Wormholes and Time Machines
- Author: John G. Cramer
- Year: 1989
- Type: Essays
- Series: The Alternate View
Editions/Publications:
- Unknown. Analog Science Fiction and Fact, June 1989 (Unknown, John G. Cramer, Davis Publications, $2.00, 196 pages, digest, MAGAZINE)