Lewis, G. E., Baird, D., & Vaughn, P. P. (1965). Early Permian vertebrates from the Cutler Formation of the Placerville area, Colorado. United States Department of the Interior, Geological Survey.
Chicago Style (17th ed.) CitationLewis, G. Edward, Donald Baird, and Peter Paul Vaughn. Early Permian Vertebrates from the Cutler Formation of the Placerville Area, Colorado. Washington: United States Department of the Interior, Geological Survey, 1965.
MLA (9th ed.) CitationLewis, G. Edward, et al. Early Permian Vertebrates from the Cutler Formation of the Placerville Area, Colorado. United States Department of the Interior, Geological Survey, 1965.
Warning: These citations may not always be 100% accurate.