D. J. Lawrence; W. C. Feldman; B. L. Barraclough; A. B. Binder; R. C. Elphic; S. Maurice; D. R. Thomsen (1998). "Global Elemental Maps of the Moon: The Lunar Prospector Gamma-Ray Spectrometer". Science. 281 (5382): 1484–1489. Bibcode:1998Sci...281.1484L. doi:10.1126/science.281.5382.1484. PMID9727970.
D. J. Lawrence; W. C. Feldman; B. L. Barraclough; A. B. Binder; R. C. Elphic; S. Maurice; D. R. Thomsen (1998). "Global Elemental Maps of the Moon: The Lunar Prospector Gamma-Ray Spectrometer". Science. 281 (5382): 1484–1489. Bibcode:1998Sci...281.1484L. doi:10.1126/science.281.5382.1484. PMID9727970.
Bell, Trudy E. (2006-11-06). Phillips, Tony (ed.). "Bizarre Lunar Orbits". Science@NASA. NASA. Archived from the original on 2021-12-04. Retrieved 2017-09-08.
D. J. Lawrence; W. C. Feldman; B. L. Barraclough; A. B. Binder; R. C. Elphic; S. Maurice; D. R. Thomsen (1998). "Global Elemental Maps of the Moon: The Lunar Prospector Gamma-Ray Spectrometer". Science. 281 (5382): 1484–1489. Bibcode:1998Sci...281.1484L. doi:10.1126/science.281.5382.1484. PMID9727970.
Bell, Trudy E. (2006-11-06). Phillips, Tony (ed.). "Bizarre Lunar Orbits". Science@NASA. NASA. Archived from the original on 2021-12-04. Retrieved 2017-09-08.