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Nitrogen-potassium ratios in relation to nutrient content and yield of cotton [microform].
Publicado 1980Visual Material -
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The production of potassium permanganate from local manganese ores
Publicado 1979Enlace del recurso
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An experimental study of the radiometric determination of potassium content of soils and minerals [microform]
Publicado 1975Visual Material -
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