1926. Russia. Geologicheski?i? komitet. Coordinates: W 20∞--E 45∞/N 72∞--N 32∞.; Includes geologic and stratigraphic legend. 62 x 52 centimeters Scale 1:6,300,000 General Map Collection. Geologicheskii? komitet (Leningrad).
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1926. Modern area represented: Toropets, Russia; Scale =1:50,000; Не подлежит оглашению. Управление военных топографов.