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The Rare Earths

Note 372 — Chapter XIV · THE ERBIUM AND YTTERBIUM GROUPS—YTTRIUM AND SCANDIUM

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Loc. cit.

[373] Ber. 1887, 20, 2134.

[374] Ber. 1908, 41, 308; also Hofmann, ibid. 1910, 43, 2631.

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