ACTINIUM (CHEMICAL ELEMENTS)
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BTHEAVY METALS (CHEMICAL ELEMENTS)
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UDC546.797
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Descriptor GERACTINIUM (CHEMISCHE ELEMENTE)
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Descriptor ENGACTINIUM (CHEMICAL ELEMENTS)
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Descriptor FREACTINIUM (ÉLÉMENTS CHIMIQUES)
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Variant GERCHEMISCHE ELEMENTE/ACTINIUM
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Variant GERAC (ACTINIUM)
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Variant ENGCHEMICAL ELEMENTS/ACTINIUM
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Variant ENGAC (ACTINIUM)
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Variant FREAC (ACTINIUM)
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NTACTINIUM COMPOUNDS (INORGANIC CHEMISTRY)