TY  - BOOK
AU  - ASTHANA , D.K.
AU  - ASTHANA , MEERA .
TI  - ENVIROMENT : PROBLEMS AND SOLUTIONS 
U1  - 363.7 AST 
PY  - 2006///
CY  - NEW DELHI
PB  - S.CHAND & COMPANY
KW  - Environmental Science
ER  -