TY  - BOOK
AU  - Agarwala , S.P.
TI  - Environmental studies
SN  - 8173197857
U1  - 372.357 21st ed.
PY  - 2006///
CY  - New Delhi
PB  - Narosa Publishing
KW  - Ecosystems
KW  - Environmental education
KW  - Nature and nurture
KW  - Pollution
N1  - 211-20 includes index
ER  -