1. Statistics of atomic frequency standards;Allan;Proc. IEEE,1966
2. Anderson, A. T. 1971, Apollo 14 Photography, Part II, 70-mm, 35-mm, 16-mm, and 5-in Frame Index, National Space Science Data Center, NASA GSFC, Greenbelt, MD.
3. Anderson, A. T, and, M. A. Niksch, 1971, Apollo 14 Lunar Photography, Part I, Data Users' Note (NSSDC 71-008A-01), National Space Science Data Center, NASA GSFC, Greenbelt, MD.
4. Crew observations;Bean;Apollo 12 Preliminary Science Report,1970
5. Interpretation of the angular dependence of backscattering from the Moon;Beckmann;J. Res. Natl. Bur. Stan.,1965