000			00352nam a2200121Ia 4500
008			140208s9999 xx 000 0 und d
020			_a00959650
044			_aU.S.A.
245			_aJournal of the American Society of Agronomy. v.31, 1939 _c
260			_bAmerican Society of Agronamy _aGeneva _c1939
300			_av.31, vii, 1086 p.; 23cm.
942			_2udc _cP
999			_c9568 _d9568