000 00298nam a2200109Ia 4500
008 230901s1982 xx 000 0 eng d
082 _a631.8 INT
245 0 _aOptimizing Yileds-The Role of Fertilizers
260 _aSwitzerland
_bInternational Potash Institute
_c1982
300 _a305
942 _2ddc
_cBK
999 _c232
_d232