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Ru| Description |
Collection in honor of Professor Nikolai Mikhailovich Knipovich: 1885-1925 / Nar.land.RSFSR.- Moscow: Nar.com.Agriculture of the RSFSR, 1927. -605: people..Source of an electronic copy: Russian Geographical Society
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| Publisher | Москва : Нар. ком. земледелия РСФСР |