Orbiting Stations: Stopovers to Space Travel
by Irwin Stambler
G.P. Putnam’s Sons, 1965
X-24 at Astronautix
Image credit: Martin Marietta
Image source: Numbers Station
Category: Martin Marietta
X-24
Frank DiPietro
The Path to Mars
Our World in Space by Isaac Asimov & Robert McCall (1974)
Image credit: NASA
Image source: Numbers Station
