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Émile Bertrand (1844–1909) was a French mineralogist, in honour of whom Bertrandite was named by Alexis Damour. He also gave his name to the ''Bertrand lens'' or phase telescope. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Émile Bertrand」の詳細全文を読む スポンサード リンク
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