Note 433 — Chapter XIV · THE ERBIUM AND YTTERBIUM GROUPS—YTTRIUM AND SCANDIUM
Reading edition
Compt. rend. 1880, 91, 56, 118.
[434] Proc. Roy. Soc. 1905, 74, 538.
[435] Phil. Trans. 1908, A, 209, 47.
[436] Sitzungsber. kaiserl. Akad. Wiss. Wien, 1910, 119, IIa, 576.