TY  - BOOK
AU  - Rana, S. V. S.
TI  - Essentials of Ecology and Environmental Science
SN  - 9788120338944
U1  - 577 RAN 
PY  - 2010///
CY  - New Delhi
PB  - PHI Learning 
KW  - Ecology
KW  - , Ecology and Environmental Science
KW  - , Definitions, Scope and History of Ecology
KW  -  And Ecology and Evolution
ER  -