TY  - BOOK
AU  - Loughlin,G.F.
TI  - The oxidized zinc ores of Leadville, Colorado,
T2  - U.S. Geological survey. Bulletin
AV  - QE75 .B9 no. 681
PY  - 1918///
CY  - Washington
PB  - Govt. print. off.
KW  - Zinc mines and mining
KW  - Colorado
N1  - At head of title: Department of the interior
ER  -