000 00244nam a2200109Ia 4500
082 _a628.4 ECK
100 _aECKENFELDER, WESLEY W.
245 _aWATER QUALITY MANAGEMENT LIBRARY
260 _bTECHNOMIC
_c1992
300 _a268
942 _2ddc
_cB
999 _c55966
_d55966