000 00322nam a2200133Ia 4500
008 230108s9999 xx 000 0 und d
100 _aHargrove W.L.
245 0 _aCover Crops For Clean Water
260 _bSoil and Water Conservation Society
260 _c1991
365 _b0.00
650 _aAgronomy
942 _cBK
999 _c249604
_d249604