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Author/Creator
- Geological Survey (U.S.)457
- United States. National Aeronautics and Space Administration41
- Maps.com (Firm)39
- Planetary Geology Program (U.S.)24
- Denson, N. M. (Norman MacLaren), 1914-12
- Scott, David Holcomb, 1916-11
- Corporación Venezolana de Guayana. Técnica Minera9
- Du Bray, E. A.9
- Tanaka, Kenneth L.8
- Chapman, Mary G.7
- Johnson, William D., Jr.7
- Kansas Geological Survey7
- Lucchitta, Ivo7
- Williams, Van S.7
- Bohannon, Robert G.6
- Evans, James George, 1938-6
- Gibson, M. L.6
- Kellogg, Karl S.6
- M'Gonigle, John W.6
- Pallister, John S.6