TY  - BOOK
AU  - Chatwall,G.R.
TI  - Encyclopaedia of environmental pollution and its control. Vol.6
SN  - 81-7041-249-8
AV  - REF TD173.E52 Vol.6 
PY  - 1989///
CY  - New Delhi
PB  -  : Anmol Publications Pvt. Ltd
KW  - Pollution,
KW  - Dictionaries and encyclopedias
ER  -