TY  - BOOK
AU  - RANA, S.V.S.
TI  - ESSENTIALS OF ECOLOGY & ENVIRONMENTAL SCIENCE
SN  - 812032773x
U1  - 628/RAN 
PY  - 2005///
CY  - NEW DELHI.
PB  - PRENTICE HALL OF INDIA PVT. LTD., NEW DELHI.
ER  -