The Rare EarthsNote 152 — Chapter IX · GENERAL PROPERTIES OF THE CERIUM AND YTTRIUM GROUPSReading editionBer. 1890, 23, 2642; 1891, 24, 873.◇[153] Annalen, 1904, 331, 58.◇Copy noteReturn to CHAPTER IX GENERAL PROPERTIES OF THE CERIUM AND YTTRIUM GROUPSReturn to CHAPTER IX GENERAL PROPERTIES OF THE CERIUM AND YTTRIUM GROUPS