TY  - BOOK
AU  - Roy, Sovan
TI  - Environmental science: a comprehensive treaties on ecology and environment 
SN  - 8187704004
U1  - 574.5 
PY  - 2003///
CY  - Kolkata 
PB  - Publishing Syndicate 
KW  - Environmetal science
KW  - Ecology
N1  - Includes index
ER  -