TY  - BOOK
AU  - Johnston,William Drumm
TI  - The gold quartz veins of Grass valley, California,
AV  - TN423.C2 J6
U1  - 557.3 
PY  - 1940///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Gold mines and mining
KW  - California
KW  - Grass Valley
N1  - At head of title: United States Department of the Interior; Map and 4 colored diagrams in pocket; Contains references
ER  -