Exploration and development in the San Juan, Paradox and Black Mesa Basins, in Wengerd, S.A., ed., Geological symposium of the Four Corners Region
Umbach, P.H., 1952, Exploration and development in the San Juan, Paradox and Black Mesa Basins, in Wengerd, S.A., ed., Geological symposium of the Four Corners Region: Four Corners Geological Society, p. 22-26.
