Drewes, H., & Williams, F. E. (1973). Mineral resources of the Chiricahua Wilderness Area, Cochise County, Arizona. U.S. Govt. Print. Off.
Chicago Style (17th ed.) CitationDrewes, Harald, and Frank E. Williams. Mineral Resources of the Chiricahua Wilderness Area, Cochise County, Arizona. Washington: U.S. Govt. Print. Off, 1973.
MLA (9th ed.) CitationDrewes, Harald, and Frank E. Williams. Mineral Resources of the Chiricahua Wilderness Area, Cochise County, Arizona. U.S. Govt. Print. Off, 1973.
Warning: These citations may not always be 100% accurate.