Arizona - its place in time. Chapter 1, The land is made Author B. Brophy Article Date November 29, 1959 Journal Title Ariz Days & Ways
A guide to the East Kaibab monocline in the Grand Canyon region Author A. N. Strahler Article Date July 1944 Journal Title Plateau
A guide to the continental triassic of northern Arizona Author C. L. Camp, and others Article Date July 1947 Journal Title Plateau