000			00330nam a2200133Ia 4500
008			130225s9999 xx 000 0 und d
100			_aDeTurk, E.E.
245			_aProblem phosphate fertilizers
260			_aIllinois _c1942
300			_a543-583 p.
440			_aIllinois Agricultural Experim
901			_a14534
942			_cB _2udc
999			_c1936 _d1936