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File:Рыкачёв Михаил. Исторический очерк Главной физической обсерватории за 50 лет ее деятельности.pdf

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Русский: Книга «Рыкачев Михаил. Исторический очерк Главной физической обсерватории за 50 лет ее деятельности. 1849—1899. Часть I. — СПб.: Типография Императорской Академии наук, 1899. — 414 с.: ил.»
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Source http://fulltext.pl.spb.ru/spbiblio/Petra/P0000446.pdf
Author М. А. Рыкачёв (1841—1919)

Михаил Александрович Рыкачёв — директор Главной физической обсерватории в 1896—1913 годах

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