John Polgreen
Source: "John Polgreen Bibliography." Author Wars, https://authorwars.com/authors/john-polgreen.html".
Pseudonyms:
Titles:
Cover Art
- Unknown. Space Flight: The Coming Exploration of the Universe
- Unknown. Space Pilots
- Unknown. Space Stations
- Unknown. Voos interplanetários
Interior Art
- Unknown. Satellites in Outer Space
- Unknown. Satellites in Outer Space
- Unknown. Satellites in Outer Space
- Unknown. Satellites in Outer Space: Revised Edition
- Unknown. Satellites in Outer Space: Revised Edition
- Unknown. Space Flight: The Coming Exploration of the Universe
- Unknown. Space Pilots
- Unknown. Space Stations
- Unknown. Voos interplanetários
- Unknown. Vuelos espaciales: Las exploraciones actuales y futuras del universo