TY  - BOOK
AU  - Batkin,Daniel B.
AU  - Keller,Edward A  .
TI  - Environmental science : earth as a living planet / 
SN  - 9788126520381
U1  - 372.357 
PY  - 2009///
CY  - New Delhi : 
PB  - Wiley India , 
KW  - ELEMENTARY EDUCATION
N1  - Includes index
ER  -