TY  - BOOK
AU  - khan, ahmed
AU  - khan, ahmed
TI  - a textbook of environmental studies  
SN  - 81 8376 053 8
U1  - 574.5 kha-tex 
PY  - 2006///
CY  - jaipur
PB  -  abd publishers
KW  - ecology, environment, Ugcd
N2  - Available
ER  -