TY  - BOOK
AU  - West, Robert Cooper
TI  - The mining community in Norther New Spain: the Parral mining district 
AV  - F 1401 I2.30
PY  - 1949///
CY  - Berkeley, Calif.
PB  - University of California
KW  - Industrias minerales -
KW  - México -
KW  - Historia
KW  - Parral, Chihuahua -
KW  - Condiciones económicas
ER  -