Braddock, W. A. (1969). Geology of the Empire quadrangle: Grand, Gilpin, and Clear Creek Counties, Colorado. U.S. Govt. Print. Off..
Chicago Style (17th ed.) CitationBraddock, William A. Geology of the Empire Quadrangle: Grand, Gilpin, and Clear Creek Counties, Colorado. Washington: U.S. Govt. Print. Off., 1969.
MLA (8th ed.) CitationBraddock, William A. Geology of the Empire Quadrangle: Grand, Gilpin, and Clear Creek Counties, Colorado. U.S. Govt. Print. Off., 1969.
Warning: These citations may not always be 100% accurate.