000			00384nam a2200145Ia 4500
008			170101s1957 xx 000 0 und d
082			_a633.009.73 M39P
100			_aMartin, John H.
245		0	_aPrinciples of field crop production
260			_aN.Y. _bMacmillan _c1957
300			_a22cm; 1176
650			_aFIELD CROPS -- U.S.
653			_aFIELD CROPS -- U.S.
942			_2ddc _cB
999			_c88138 _d88138