TY  - BOOK
AU  - Gray,John E.
ED  - United States.
ED  - United States
TI  - Geologic studies of mercury by the U.S. Geological Survey / 
SN  - 060792621X
U1  - 622.3454 
PY  - 2003///.
CY  - Reston, Virginia: 
PB  - U. S. Geological Survey, , U. S. Department of the Interior
KW  - Mercury
KW  - Environmental aspects
KW  - Mercury mines and mining
N1  - Includes bibliographical references (p. 41)
ER  -