Gregory, H.E., 1915, The Navajo Country: American Geographical Society of New York, Bulletin, v. 47, p. 561-577.
Physiography
Keywords Group
The Navajo Country
Regional physiographic map of the western United States
Godson, R., 198O, Regional physiographic map of the western United States: U.S. Geological Survey, unpublished map. (Menlo Park, Calif.).
The Ajo mining district, Arizona
Gilluly, James, 1946, The Ajo mining district, Arizona: U.S. Geological Survey Professional Paper 209, 112 p., 10 sheets, scale 1:6,000; 1:12,000; 1:62,500.
Geology and ore deposits of the Ajo quadrangle, Arizona
Gilluly, James, 1937, Geology and ore deposits of the Ajo quadrangle, Arizona: Arizona Bureau of Mines Bulletin no. 141, 83 p., 4 sheets, scale 1:62,500.
Physiography of the Ajo region, Arizona
Gilluly, James, 1937, Physiography of the Ajo region, Arizona: Geological Society of America Bulletin, v. 48, no. 3, p. 323-347, 1 sheet, scale 1:62,500.
Pediments of the Ajo region, Arizona [abs.]
Gilluly, James, 1936, Pediments of the Ajo region, Arizona [abs.]: Washington Academy of Sciences, Journal, v. 26, p. 388-389.
Physiography of western United States
Fenneman, N.M., 1931, Physiography of western United States: New York, McGraw-Hill, 534 p.
Physical and geological description of the country from the initial point on the Pacific to the junction of the Gila and the Colorado
Emory, W.H., 1857, Physical and geological description of the country from the initial point on the Pacific to the junction of the Gila and the Colorado: U.S. and Mexican Boundary Survey Report, v. 1, Part 2, p. 78-92.
Tertiary history of the Grand Canyon district
Dutton, C.E., 1978, Tertiary history of the Grand Canyon district: Sierra, v. 63, p. 17-19.
The panorama from Point Sublime, in Babbitt, B., compiler, Grand Canyon: An anthology
Dutton, C.E., 1978, The panorama from Point Sublime, in Babbitt, B., compiler, Grand Canyon: An anthology: Flagstaff, Northland Press, p. 61-75.
