TY  - BOOK
AU  - SANTRA,S.C.
TI  - Environmental Science
SN  -  81-7381-404-X
U1  - 333.7 
PY  - 2001///
CY  - kolkata
PB  - new central book agency
KW  - Environmental
KW  - Science
N1  - including bibliography and index
ER  -