TY  - BOOK
AU  - Rana,S.V.S.
TI  - Essentials of ecology and environmental science
SN  - 9788120347861
U1  - 577 21
PY  - 2015///
CY  - New Delhi
PB  - PHI Learning
KW  - ECOLOGY
N1  - Includes bibliographical referrences and index
ER  -