000 00303nam a2200109Ia 4500
008 130131s9999 xx 000 0 und d
082 _a630.685 EFF
100 _aEfferson, J.N
245 _aPrinciples of farm management
260 _aMcgraw-Hill
650 _aAgriculture. Agricultural biotechnology
999 _c31933
_d31523