TY  - BOOK
AU  - x, x
AU  - Chhatwal,G.R.
TI  - Encyclopedia of environmental pollution and its control: x
SN  - 8170412439 (Set)
U1  - R363.73903/E56 
PY  - 1989///
CY  - New Delhi
PB  - Anmol
KW  - Pollution - encyclopedias
N1  - x
ER  -