TY  - GEN
AU  - Swarup, R
TI  - Encyclopaedia of ecology, environment & pollution control, Vol.20: environment an assessment
SN  - 8170993806
U1  - 363.7003 
PY  - 1992///
CY  - New Delhi
PB  - Mittal
KW  - SOCIAL SCIENCE
ER  -