TY  - BOOK
AU  - Chhatwal G R Ed
TI  - Encyclopaedia of environmental air pollution
U1  - U47:558k1,N97, N7.1-.3  (R R) 
PY  - 1997///
CY  - New Delhi
PB  - Anmol     
KW  -  GEOGRAPHY
KW  - ENCYCLOPEDIAS AND DICTIONARIES
ER  -