TY  - BOOK
AU  - Agarwala, K.M.
AU  - Sikdar, P.K.
AU  - Deb, S.C.
TI  - A textbook of environment
SN  -  978-0333-93747-1
U1  - 375.0083 
PY  - 2002///, r2013
CY  - Kolkata
PB  - Macmillan
KW  - ENVIRONMENTAL SCIENCE
ER  -