000 00453nam a2200133Ia 4500
008 140208s9999 xx 000 0 und d
044 _aSwitzerland
080 _a631.8 IN8Q
100 _aInternational Potash Institute
245 _aOptimizing yields the role of fertilizers : proceedings of the 12th IPI Congress
_cInternational Potash Institute
260 _bInternational Potash Institute
_aBerne
_c1982
300 _a305 p.; 23cm.
942 _2udc
_cGB
999 _c19902
_d19902