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082			_a631.811.3(100)(061.3) M0
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260			_aBerne, Switzerland _bInternational Potash Institute _c1980
300			_a200p.
600			_aPotassium Workshop. Ibadan, Nigeria, International Institute of Tropical Agriculture, Oct.1980.
650			_aFertilizers,Conferences
942			_cGRBK
999			_c82176 _d82176