1. Extra-Terrestrial Relays;Clarke;Wireless World,1945
2. Fast Reconnaissance Missions to the Outer Solar System Utilizing Energy Gained from the Gravitational Field of Jupiter;Flandro;Astronautica Acta,1966
3. Tropical and Equatorial Meteorology;Garbell,1947
4. Whisker Technology;Levitt,1970
5. Mechanical Behavior of Engineering Materials;Marin,1962