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DE342128C
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Process for the production of an incandescent material from brown coal, peat and similar substances
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AU1153513B
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Process of continuously working up a mixture of reducing agents with substances containing reducible metalic compounds and apparatus therefor
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AU707012B
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Improvements in furnaces for working up ores
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AU229611B
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A new or improved process for the desulphuration of sulphate of zinc
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AU1593509B
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Improved process for obtaining' zinc from zinciferous material
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AU1424309B
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Process forthe preparation of zinc oxide for reduction
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