TY  - BOOK
AU  - Steven,Thomas August
AU  - Ratté,James Clifford
TI  - Geology and ore deposits of the Summitville district, San Juan Mountains, Colorado,
AV  - QE75 .P9 no. 343
U1  - 557.883 
PY  - 1960///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Geology
KW  - Colorado
KW  - Petrology
KW  - Ore deposits
KW  - San Juan Mountains (Colo. and N.M.)
N1  - Part of illustrative matter fold. in pocket; "Prepared in cooperation with the Colorado Metal Mining Fund Board."; Bibliography : p. 66-67
ER  -