DK64224C - Fremgangsmaade til Fremstilling af metallisk Mangan ud fra Mineraler, i hvilke Manganets Iltningstrin ligger over Monoksydet.
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Fremgangsmaade til Fremstilling af metallisk Mangan ud fra Mineraler, i hvilke Manganets Iltningstrin ligger over Monoksydet.
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DK188141A1940-10-081941-09-20Fremgangsmaade til Fremstilling af metallisk Mangan ud fra Mineraler, i hvilke Manganets Iltningstrin ligger over Monoksydet.
DK64224C
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