000 00315nam a2200121Ia 4500
008 161118s2016 xx 000 0 und d
082 _a631.7 WILL-A
100 _aWillrich,T.L.
245 0 _aAgricultural Practices & Water Quality.
260 _aLowa
_bLowa State Univ.Press
_c1970
300 _a415p.
942 _2ddc
999 _c26310
_d26310