1. A section of the Paleozoic formations of the Grand Canyon at the Bass Trail Author/Creator: Noble, L. F. 1882-1965, (Levi Fatzinger), author Publication/Creation: [Washington] : [Department of the Interior, United States Geological Survey], [1923] Resource Type: Book Access & Availability: Loading
2. Stratigraphic relations of the Austin, Taylor, and equivalent formations in Texas Author/Creator: Stephenson, Lloyd William, 1876-1962, author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1937 Resource Type: Book Access & Availability: Loading
3. Stratigraphy and depositional environments of the upper Pleistocene Chemehuevi Formation along the lower Colorado River Publication/Creation: Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2011 Resource Type: Book Access & Availability: Loading