North Mongolia.1: Preliminary reports of the geological, geochemical and soil-geographical expedition on works performed in 1925

North Mongolia.1: Preliminary reports of the geological, geochemical and soil-geographical expedition on the works performed in 1925 / Commission.by scientific.research.Mongol.And Tannu-Tuvinsk.republics, comp.Under the Council of Nar.Commissars of the USSR.- Leningrad: Publishing House Acad.Sciences of the USSR, 1926. -605: Territory..Source of an electronic copy: Russian Geographical Society