TY  - BOOK
AU  - Lovering,T.S.
TI  - Geology and ore deposits of the Breckenridge mining district, Colorado
T2  - Professional paper / U.S. Dept. of the Interior, Geological Survey
AV  - QE75 .P9 no. 176
PY  - 1934///
CY  - Washington [D.C.]
PB  - U.S. Govt. Print. Off.
KW  - Geology
KW  - Colorado
KW  - Summit County
KW  - Ore deposits
N1  - 5 maps in pocket; Includes bibliographical references and index
ER  -