1. Opportunities and Choices in Space Science, 1974, National Academy of Science, Washington, January 1975.
2. Automatic Control in Planetary Exploration in the 1980s;Mооrе,1973
3. A System of Lunar Photography and Data Transmission;Scull,1960
4. Project Ranger;Hall,1971
5. The Ranger 4 Flight Path and Its Determination From Tracking Data;Hamilton,1962