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020 _a116650
082 _a581.072
_bCOL
_223
100 _aCOLLOQIUM of the Internatio
245 _aMethods of K-Research in plants
_c/June 19-21, 1989
260 _aSwitzerland
_bInternational Potash Institute, CH-3048 Worblaufen-Bern
_c1989
300 _a336 p.
942 _cR