000 00305nam a2200133Ia 4500
008 221030s9999 xx 000 0 und d
041 _aEnglish
082 _a105.23
100 _aP. V. Rao
245 0 _aText Book of Environmental engineering
_cby P. V. Rao
260 _c0
650 _aB
942 _cBK
999 _c13208
_d13208