1. Dick, Steven J., 50 Years of NASA History,
http://www.gov/50th_magazine/historyLetter.html
2. Hall, R. Cargill, Lunar Impact: The NASA History of Project Ranger, Dover Publishing, 2010
3. Heacock, Raymond L, Lunar Photography: Techniques and Results, Kluwer Academic Publishers, articles.adsabs.harvard.edu
4. Jet Propulsion Laboratory report Ranger IX Photographs of the Moon, December 1965
5. Jet Propulsion Laboratory report Ranger VIII Photographs of the Moon, August 1964