TY  - BOOK
AU  - Yadav, Suresh Chandra
AU  - Kumari, Munni
TI  - Changing state of environment
U1  - 363.7 21st ed.
PY  - 1993///
CY  - Patna
PB  - Kitab Mahal Agencies
KW  - Air Pollution
KW  - Noise pollution
KW  - Pollution
KW  - Soil pollution
KW  - Water pollution
ER  -