The Rare EarthsNote 472 — Chapter XVI · THE GROUP IVA ELEMENTS (continued)—ZIRCONIUM AND THORIUMReading editionBiltz and Mecklenburg, Zeitsch. angew. Chem. 1912, 25, 2110.◇Copy noteReturn to CHAPTER XVI THE GROUP IVA ELEMENTS (continued)—ZIRCONIUM AND THORIUM