TY  - BOOK
AU  - Cumming,James D.
TI  - Diamond drill handbook
U1  - 622.2 
PY  - 1956///].
CY  - Toronto: 
PB  - J. K. Smit & Sons of Canada, 
KW  - Rock-drills
KW  - Diamonds, Industrial
N1  - Includes index (p. 645-655)
ER  -