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Amazon.fr - An Analysis of the ARC and Spark Spectra of Yttrium (Yt I and Yt II) (Classic Reprint) - Meggers, William F. - Livres
Amazon.fr - Observations on the Rare Earths, the Purification of Erbium, with Special Reference to the Separation from Yttrium, the Atomic Weight of Erbium: Thesis (Classic Reprint) - Wichers, Edward - Livres