1. The Measure of the Moon;Baldwin,1963
2. Terrestrial meteorite craters and their lunar counterparts;Beals,1967
3. The origin of lunar craters;Boneff,1965
4. Geologic map of the Mare Serenitatis region of the Moon;Carr;U.S., Geol. Surv., Misc. Geol. Invest.,1966
5. Geologic map of Lunar Orbiter site II P-2, southwestern Mare Tranquillitatis;Carr;U.S., Geol. Surv., Map,1968