Note 559 — Chapter XXI · OTHER TECHNOLOGICAL USES OF THE CERIUM AND YTTRIUM ELEMENTS, ZIRCONIUM AND THORIUM
Reading edition
Vide Böhm, Chem. Zeitg. 1910, 34, 377; also Kellermann, Die Ceritmetalle und ihre pyrophoren Legierungen, Wilhelm Knapp, Halle, 1912, pp. 94 et seq.