Peterson, D.L., Conradi, Arthur, and Zohdy, A.A.R., 1967, Principal facts for gravity stations in the Yuma, Arizona, and Blythe, California areas: U.S. Geological Survey Open-File Report [unnumbered], 34 sheets.
Peterson, D.L., Conradi, Arthur, and Zohdy, A.A.R., 1967, Principal facts for gravity stations in the Yuma, Arizona, and Blythe, California areas: U.S. Geological Survey Open-File Report [unnumbered], 34 sheets.
Mineral District, Gravity Survey,