Yuma area

Keith, Stanton B., 1978, Index of mining properties in Yuma County, Arizona: Arizona Bureau of Geology and Mineral Technology Bulletin 192, 185 p.

Johnson, M.G., 1972, Placer gold deposits of Arizona: U.S. Geological Survey Bulletin 1355, 103 p., 1 sheet.

Howard, C.S., 1948, Quality of water in the upper Colorado River basin: American Geophysical Union, Transactions, v. 29, no. 3, p. 375-378.

Hely, A.G., and Peck, E.L., 1964, Precipitation, runoff, and water loss in the lower Colorado River-Salton Sea area: U.S. Geological Survey Professional Paper 486-B, 16 p, 7 sheets, scales 1:500,000 and 1:1,000,000.

Hely, A.G., 1969, Lower Colorado River water supply--Its magnitude and distribution: U.S. Geological Survey Professional Paper 486-D, 54 p.

Heintzelman, S.P., 1851, [Letter concerning his Colorado River survey below Yuma, Arizona.]: San Francisco Daily Herald (newspaper), Oct. 22.

Heck, N.H., 1938, Earthquakes and the western mountain region: Geological Society of America Bulletin, v. 49, no. 1, p. 1-21.

Halpenny, L.C., and others, 1952, Ground water in the Gila River basin and adjacent areas, Arizona--A summary: U.S. Geological Survey Open-File Report [unnumbered], Tucson, Ariz., October 1952, 224 p.

Grover, N.C., Follansbee, Robert, Purton, A.B., and Rice, R.C., 1927, Surface water supply of the United States, 1922, Part IX. Colorado River Basin: U.S. Geological Survey Water-Supply Paper 549, 175 p.

Grover, N.C., Follansbee, Robert, Purton, A.B., and Rice, R.C., 1927, Surface water supply of the United States, 1923, Part IX. Colorado River Basin: U.S. Geological Survey Water-Supply Paper 569, 189 p.