TY  - BOOK
ED  - Radha, S.
ED  - Sankhyan, Amar Singh
TI  - Environmental challenges of the 21st century
SN  - 81 7629 359 8
U1  - 333.70905 
PY  - 2002///
CY  - New Delhi
PB  - Deep & Deep Publications
KW  - Environmental challenges--21st century
KW  - Environmental science--21st century
ER  -