TY  - BOOK
AU  - Braddock,William A.
TI  - Geology of the Empire quadrangle: Grand, Gilpin, and Clear Creek Counties, Colorado,
T2  - Geolgoical Survey professional paper 616
AV  - QE75 .P9 no. 616
U1  - 557.88/6 
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Geology
KW  - Colorado
N1  - Bibliography: p. 52-53
ER  -