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© May 2005 Lorentz JÄNTSCHI && Sorana Daniela BOLBOACĂ

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 D01 Inorganic Chemicals D007287 +
 D01.552 Metals D008670 +
 D01.552.550 Metals, Rare Earth D008674 +
 D01.552.550.399 Lanthanoid Series Elements D028581 +
 D01.552.550.399.992 Ytterbium D015018