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Author/Creator
- Geological Survey (U.S.)89
- United States. National Aeronautics and Space Administration84
- Planetary Geology Program (U.S.)80
- Coastal and Marine Geology Program (Geological Survey)2
- Morton, Robert A.2
- Peterson, Russell L.2
- Air Force Civil Engineer Center (U.S.)1
- Dartnell, Peter1
- Herkenhoff, Ken1
- Mars, John C.1
- Planetary Geology and Geophysics Program (U.S.)1
- Scripps Institution of Oceanography1
- Tillman, Fred D.1