Larsen, E. S., & Cross, W. (1956). Geology and petrology of the San Juan region, southwestern Colorado: A comprehensive geologic and petrologic study of the occurrence and origin of the rocks in an area of 12,000 square miles in southwestern Colorado. U.S. Gov. Print. Off.
Chicago-Zitierstil (17. Ausg.)Larsen, Esper S., und Whitman Cross. Geology and Petrology of the San Juan Region, Southwestern Colorado: A Comprehensive Geologic and Petrologic Study of the Occurrence and Origin of the Rocks in an Area of 12,000 Square Miles in Southwestern Colorado. Washington, DC: U.S. Gov. Print. Off, 1956.
MLA-Zitierstil (9. Ausg.)Larsen, Esper S., und Whitman Cross. Geology and Petrology of the San Juan Region, Southwestern Colorado: A Comprehensive Geologic and Petrologic Study of the Occurrence and Origin of the Rocks in an Area of 12,000 Square Miles in Southwestern Colorado. U.S. Gov. Print. Off, 1956.