TY  - BOOK
AU  - Khan, Wasim Ahmed
TI  - Paryavaran vigyan vishvkosh
SN  - 9788190724654
U1  - G:55k  Q1.2  RR 
PY  - 2011///
CY  - New Delhi
PB  - Rajat Prakashan,     
KW  - Hindi
ER  -