Method of obtaining and possibility of using of new complex fertilizers from flotation sludge – potassium-magnesium ore processing wastes von Smetannikov, An. F., Korlyakov, K. N., Onosov, D. V., Tsema, L. G., Onosova, E. F., Shishkov, D. G., Vasbieva, M. T., Smetannikov, Al. F.

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