APA (7th ed.) Citation

Geological Survey (U.S.) & Nowlan, G. A. (1989). Mineral resources of the Ragged Top Wilderness Study Area, Pima County, Arizona. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and G. A. Nowlan. Mineral Resources of the Ragged Top Wilderness Study Area, Pima County, Arizona. [Reston, Va.]: Dept. of the Interior, U.S. Geological Survey, 1989.

MLA (9th ed.) Citation

Geological Survey (U.S.) and G. A. Nowlan. Mineral Resources of the Ragged Top Wilderness Study Area, Pima County, Arizona. Dept. of the Interior, U.S. Geological Survey, 1989.