000 00286nam a2200109Ia 4500
008 191031s9999 xx 000 0 und d
100 _aProceeding of the 20th
245 0 _aMethodological in Soil - Research
260 _b"Int.Potash Instt,Switzerland"
260 _c1987
942 _cBK
999 _c216901
_d216901