000 00278nam a2200109Ia 4500
008 170101s1992 xx 000 0 und d
082 _a639.311 BOY
100 _aBoyd, C.E
245 0 _aWater quality management for pond fish culture
260 _aLondon
_c1992
942 _2ddc
_cBK
999 _c79531
_d79531