Note 368 — Chapter XIV · THE ERBIUM AND YTTERBIUM GROUPS—YTTRIUM AND SCANDIUM
Reading edition
Publ. astrophys. Observ. Potsdam, 1909, 20, No. 60.
[369] Sitzungsber. kaiserl. Akad. Wiss. Wien, 1910, 119, IIa, 9.
Reading edition
Publ. astrophys. Observ. Potsdam, 1909, 20, No. 60.
[369] Sitzungsber. kaiserl. Akad. Wiss. Wien, 1910, 119, IIa, 9.