Bouguer and isostatic residual gravity maps of the Colorado River region, including the Kingman, Needles, Salton Sea, and El Centro quadrangles
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Arizona, California, Nevada↗
Geology topics
M.G. Helferty
Publications and source records attributed to M.G. Helferty.
Principal facts for 113 gravity stations in the Salton Sea 1 degree x 2 degrees Quadrangle, Southern California
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Open-File Report↗