TY  - BOOK
AU  - Barnes John W
TI  - Ores and minerals: introducing economic geology
U1  - H7, M8 
PY  - 1988///
CY  - Milton
PB  - Keynes Open University Press      
KW  -  Economic geology
KW  -  Mineral resources
KW  -  Mines
KW  - Geology
ER  -