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1by Russia. Glavnoe gidrograficheskoe upravlenīe;“... points plotted by Lieutenant-Colonel Davydov in 1914.; "Masshtabʺ 1/760464 ili 8696 s. (10 milʹ) vʺ...”
Published 1914
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2by Зиновьев, Василий“... focuses on the role the Trans-Baikal expedition headed by lieutenant-colonel N.A. Agte played...”
Published 2013
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