TY  - BOOK
AU  - VERMA,P.S.
AU  - Agarwal, V.K.
TI  - Ennvironmental biology: principles of ecology
SN  -  9788121908597
U1  - 577 
PY  - 2007///
CY  - New Delhi
PB  - S. Chand
KW  - Ecology
KW  - Environmental biology
KW  - Biology
N1  - Includes index and bibliographical references
ER  -