APA

Zen E., United States Geological Survey, . (1988). Bedrock geology of the Vipond Park 15-minute, Stine Mountain 7 1/2-minute, and Maurice Mountain 7 1/2-minute quadrangles, Pioneer Mountains, Beaverhead County, Montana. [Washington, DC]: United States Gov. Print. Office.

Chicago

Zen E-an, United States Geological Survey, . 1988. Bedrock geology of the Vipond Park 15-minute, Stine Mountain 7 1/2-minute, and Maurice Mountain 7 1/2-minute quadrangles, Pioneer Mountains, Beaverhead County, Montana. [Washington, DC]: United States Gov. Print. Office.

Harvard

Zen E., United States Geological Survey, . (1988). Bedrock geology of the Vipond Park 15-minute, Stine Mountain 7 1/2-minute, and Maurice Mountain 7 1/2-minute quadrangles, Pioneer Mountains, Beaverhead County, Montana. [Washington, DC]: United States Gov. Print. Office.

MLA

Zen E-an, United States Geological Survey, . Bedrock geology of the Vipond Park 15-minute, Stine Mountain 7 1/2-minute, and Maurice Mountain 7 1/2-minute quadrangles, Pioneer Mountains, Beaverhead County, Montana. [Washington, DC]: United States Gov. Print. Office. 1988.