TY  - BOOK
AU  - Lewis, R. S.
TI  - Elements of mining
U1  - 622 LEW 
PY  - 1945///
CY  - New York
PB  - John Wiley and Sons, 
KW  - Mining methods
KW  - Mining technology
KW  - Mineral extraction
N1  - Includes index
ER  -