TY  - BOOK
AU  - Asthana, D.K. ;
AU  - Asthana, Meera ;
TI  - Environment : problems and solutions
SN  - 8121916542
U1  - 363.7 
PY  - 2001///
CY  - New Delhi
PB  - S.Chand & Company
KW  - Environmental sciences.
KW  - Nature -- Effect of human beings on
N1  - Included Glossary & Index
ER  -