000			00435nam a2200145Ia 4500
008			140208s9999 xx 000 0 und d
044			_aU.S.A.
080			_a631.5 D14C
100			_aDelorit, Richard J.
245			_aCrop production : principles and practices _cRichard J. Delorit and Henry L. Ahlgren
260			_bPrentice-Hall _aEnglewood Cliffs _c1953
300			_ax, 629 p.; 21cm.
700			_aAhlgren, Henry L.
942			_2udc _cGB
999			_c596 _d596