000			00311nam a2200109Ia 4500
008			191031s9999 xx 000 0 und d
100			_aProceeding of the 19th
245		0	_aPottasium in the Agricultural systems of the humid tropics
260			_b"Int.Potash Instt,Switzerland"
260			_c1985
942			_cBK
999			_c216900 _d216900