APA

Freethey G. W., Cordy G. E. & National Regional Aquifer System Analysis Program (U.S.). (1991). Geohydrology of Mesozoic rocks in the Upper Colorado River Basin in Arizona, Colorado, New Mexico, Utah, and Wyoming, excluding the San Juan Basin. Washington: U.S. G.P.O.

Chicago

Freethey Geoffrey W, Cordy Gail E and National Regional Aquifer System Analysis Program (U.S.). 1991. Geohydrology of Mesozoic rocks in the Upper Colorado River Basin in Arizona, Colorado, New Mexico, Utah, and Wyoming, excluding the San Juan Basin. Washington: U.S. G.P.O.

Harvard

Freethey G. W., Cordy G. E. and National Regional Aquifer System Analysis Program (U.S.). (1991). Geohydrology of Mesozoic rocks in the Upper Colorado River Basin in Arizona, Colorado, New Mexico, Utah, and Wyoming, excluding the San Juan Basin. Washington: U.S. G.P.O.

MLA

Freethey Geoffrey W, Cordy Gail E and National Regional Aquifer System Analysis Program (U.S.). Geohydrology of Mesozoic rocks in the Upper Colorado River Basin in Arizona, Colorado, New Mexico, Utah, and Wyoming, excluding the San Juan Basin. Washington: U.S. G.P.O. 1991.