TY  - BOOK
AU  - SINGHAL K Y;
TI  - ENVIRONMENTAL SCIENCE
SN  - 81-224-1848-1
U1  - 628 
PY  - 2006///
CY  - NEWDELHI
PB  - NEW AGE INTERNATIONAL PVT LTD
KW  - ENVIRONMENTAL SCIENCE
N1  - 674
ER  -