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Gatrell P. Refugees in the Russian Empire, 1914—1917 // Critical Companion to the Russian Revolution 1914—1921 / Eds. E. Acton, V.I. Cherniaev, W.G. Rosenberg. Bloomington, 1997. P. 554—564; Idem. A Whole Empire Walking: Refugees in Russia during World War I. Bloomington, 1999. P. 195—197.