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Babenroth, D. L., and Strahler, A. N., 1945, Geomorphology and structure of the East Kaibab monocline, Arizona and Utah: Geol. Soc. America Bull., v. 56, p. 107-150.

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Childs, O. E., 1948, Geomorphology of the valley of the Little Colorado River, Arizona: Geol. Soc. America Bull., v. 59, no. 4, p. 353-388.

Colton, H. S., 1937, revised 1950, The basaltic cinder cones and lava flows of the San Francisco Mountain volcanic field, Arizona: Mus. Northern Arizona Bull. 10, 49 p.

Feth, J. H., 1953, A geologic and geophysical reconnaissance of the Doney Park—Black Bill Park area, Arizona, With reference to ground Water, with a section on Geophysics by C. B. Yost, Jr.: U.S. Geol. Survey Circ. 233, 11 p.

Irwin, J. H., and Stevens, P. R., 1955, Part of the preliminary geologic map of the Black Falls 3 quadrangle, Arizona: U.S. Geol. Survey open-file map.

Robinson, H. H., 1913, The San Franciscan volcanic field, Arizona: U. S. Geol. Survey Prof. Paper 76, 213 p.

U.S. Public Health Service, 1946, Drinking Water standards: Public Health Repts., v. 61, no. 11, p. 371-384; Reprint no. 2697.