Keyes, Charles, 1930, Stratigraphical affinities of Aubreyan limestones of Grand Canyon: Pan-American Geologist, v. 54, no. 2, p. 140-143.
Pan-American Geologist, v. 54, no. 2, p. 140-143.
History, Stratigraphy, (Aubrey Group) - Permian, (Aubrey limestone)[Kaibab Fm][Kaibab Limestone]/[Toroweap Fm],