TY  - BOOK
AU  - 
TI  - Diamond Drilling
U1  - 622.24 CHU 
PY  - 1971///
CY  - New Delhi
PB  - Oxford & IBH Pub. Co.
KW  - Rock - Drills
KW  - Boring
N1  - Includes bibliographical references  ( p.: 472 - 478 ), indexs ( p.: 481 - 484 )
ER  -