1. Hydrogeology of the Cenozoic igneous rocks, Navajo and Hopi Indian Reservations Arizona, New Mexico, and Utah, Author/Creator: Akers, J. P. Publication/Creation: Washington : U.S. Govt. Print. Off, 1971 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 521 A-F. Access & Availability: Loading