Doettl, J. (1890). Über einige neuere physikal Apparate.
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Dyfyniad Arddull Chicago
Doettl, Johann. Über Einige Neuere Physikal Apparate. Salzburg, 1890.
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Dyfyniad MLA
Doettl, Johann. Über Einige Neuere Physikal Apparate. 1890.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.