The Rare EarthsNote 484 — Chapter XVI · THE GROUP IVA ELEMENTS (continued)—ZIRCONIUM AND THORIUMReading editionZeitsch. anorg. Chem. 1913, 83, 143.◇[485] Halla, loc. cit.◇Copy noteReturn to CHAPTER XVI THE GROUP IVA ELEMENTS (continued)—ZIRCONIUM AND THORIUMReturn to CHAPTER XVI THE GROUP IVA ELEMENTS (continued)—ZIRCONIUM AND THORIUM