TY  - BOOK
AU  - Chugh, C P
AU  - Sharma, V. M
AU  - Steele, Ken
TI  - Design criteria for drill rigs : equipment and drilling techniques
SN  - 9789054102571
U1  - 622.23 CHU 
PY  - 1996///
CY  - Rotterdam
PB  - A.A. Balkema
KW  - Boring
KW  - Boring machinery -- Design and construction
ER  -