000 00303nam a2200121Ia 4500
008 160710s1986 xx 000 0 und d
082 _a613.ALA
100 _aALAN SINGH
245 _aENVIORMENTAL SCIENCE AND ENGINEERIG
260 _bINTERNATIONAL BOOK TRADERS
_c1986
300 _a254
942 _2ddc
_cB
999 _c47376
_d47376