COMPOUNDS ORGANIC OR INORGANIC OF RARE-EARTH METALS YTTRIUM OR SCANDIUM OR MIXTURES OF THESE METALS: - OTHER: - - COMPOUNDS OF EUROPIUM GADOLINIUM TERBIUM DYSPROSIUM HOLUMIUM ERBIUM THULIUM YTERBIUM LUTHEIUM CITIUM OR YTTRIUM
COMPOUNDS ORGANIC OR INORGANIC OF RARE-EARTH METALS YTTRIUM OR SCANDIUM OR MIXTURES OF THESE METALS: - OTHER: - - COMPOUNDS OF EUROPIUM GADOLINIUM TERBIUM DYSPROSIUM HOLUMIUM ERBIUM THULIUM YTERBIUM LUTHEIUM CITIUM OR YTTRIUM