The Rare EarthsNote 389 — Chapter XIV · THE ERBIUM AND YTTERBIUM GROUPS—YTTRIUM AND SCANDIUMReading editionSitzungsber. kaiserl. Akad. Wiss. Wien, 1910, 119, IIa, 103.◇Copy noteReturn to CHAPTER XIV THE ERBIUM AND YTTERBIUM GROUPS—YTTRIUM AND SCANDIUM