TY  - BOOK
AU  - Khopkar S M
TI  - Environmentla pollution analysis
SN  - 81  224 0463  4
U1  - 341.7623 
PY  - 1993///
CY  - Thiruvananthapuram
PB  - Newage International
KW  - Statisticsനാടകം
ER  -