- Author: John Polgreen Author Record # 166485
- Language: English
- Used These Alternate Names: J. Polgreen
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Cover Art
- Space Pilots (1957)
- Space Stations (1958)
- Space Flight: The Coming Exploration of the Universe (1959)
- Voos interplanetários [Portuguese] (1968) [only as by J. Polgreen]
- Space Pilots (1957)
- Space Stations (1958)
- Space Flight: The Coming Exploration of the Universe (1959)
- Satellites in Outer Space (1960)
- Satellites in Outer Space (1960)
- Satellites in Outer Space (1964)
- Satellites in Outer Space: Revised Edition (1964)
- Vuelos espaciales: Las exploraciones actuales y futuras del universo [Spanish] (1967)
- Voos interplanetários [Portuguese] (1968) [only as by J. Polgreen]