TY  - BOOK
AU  - Asthana D. K.
TI  - Enviroment: problems and solutions
SN  - 8121916542
AV  - GE 76 .A 88 2012
PY  - 1998///
CY  - New Delhi
PB  - S.chand
N1  - Include Glossary and Index
ER  -