TY  - BOOK
AU  - Eckel,Edwin Butt
TI  - Geology and ore deposits of the La Plata district, Colorado,
AV  - QE75 .P9 no. 219
U1  - 557.88 
PY  - 1949///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Geology
KW  - Colorado
KW  - La Plata district
KW  - Ore deposits
N1  - Part of illustrative matter folded in pocket; Bibliographical footnotes
ER  -