TY  - BOOK
AU  - G R Chhatwal
TI  -  Encyclopaedia Of Environmental Analysis-Vol.III
SN  - 81-7488-437-8
U1  - 363.7063 CHH/EN 
PY  - 1997///
CY  - New Delhi
PB  - Anmol Publication
KW  - sub-urface drilling techniques
KW  - water analysis
ER  -