000 00309nam a2200097Ia 4500
008 120224s9999 xx 000 0 und d
082 _a631.51
_bSPR
100 _aSprague, Milton A.
245 _aNo-tillage and surface-tillage agriculture : the tillage revolution
260 _bJohn Wiley
_aNew York
_c1986
999 _c133078
_d133078