Biostratigraphy

King, R.E., 1930, The geology of the Glass Mountains, Texas - Part II, Faunal summary and correlation of the Permian formations with description of Brachiopoda: University of Texas Bulletin 3042, 245 p.

Keyes, C.R., 1940, Devonic Ouray limestone of Colorado in Arizona: Pan-American Geologist, v. 74, no. 1, p. 68-70.

Keyes, Charles, 1940, Range of the Redwall of Grand Canyon: Pan-American Geologist, v. 73, no. 4, p. 269-281.

Keyes, C.R., 1940, Eastward extension of Aubreyan limestone from Grand Canyon: Pan-American Geologist, v. 73, no. 3, p. 236-240.

Keyes, Charles, 1936, Geological age of rim rocks of the Grand Canyon: Pan-American Geologist, v. 66, no. 3, p. 195-216.

Keyes, Charles, 1923, Biotic resolution of Red Wall Limestone of Grand Canyon: Pan-American Geologist, v. 39, no. 1, p. 57-61.

Karlstrom, T.N.V., Swann, G.A., and Eastwood, R.L., eds., 1974, Geology of northern Arizona with notes on archaeology and paleoclimate, Part 2 - Area studies and field guides: Geological Society of America, Rocky Mountain Section, Annual Meeting, 27th, Flagstaff, Ariz., 1974, p. 409-805.

Johnson, Noye M., Opdyke, N.D., and Lindsay, E.H., 1975, Magnetic polarity stratigraphy of Pliocene-Pleistocene terrestrial deposits and vertebrate faunas, San Pedro Valley, Arizona: Geological Society of America Bulletin, v. 86, no. 1, p. 5-12.

Johnson, J.G., 1970, Taghanic onlap and the end of North American Devonian provinciality: Geological Society of America Bulletin, v. 81, no. 7, p. 2077-2106.

Jackson, R.L., 1952, Pennsylvanian-Permian facies of the Supai Formation in central Arizona, in Shride, A.F., McKee, E.D., and Harshbarger, J.W., eds., Guidebook for field trip excursions in southern Arizona, Geological Society of America, Cordilleran Section Meeting, April 10-14, 1952, Tucson, Arizona: Arizona Geological Society, p. 143-146.