000 00342nam a2200157Ia 4500
008 190201s9999 xx 000 0 und d
020 _a8122410979
082 _a628
082 _b162 EL
100 _a"Elangovan, R."
245 0 _aUnit Operations in Envir
260 _aNew Delhi
260 _bNew Age
260 _c1997
300 _a178
999 _c47248
_d47248