TY  - BOOK
AU  - Trivedi,R.N., x
AU  - x
TI  - A text book of environmental sciences: x
SN  - 8174885447
U1  - 628.168/T841t 
PY  - 1997///
CY  - New Delhi
PB  - Anmol pub.
KW  - Environmental
N1  - x
ER  -