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  • Expansion and colonialism on the eastern frontier : views of Siberia and the Far East in pre-Petrine Russia
  • The geological and geographical exploration of Siberia and Central Asia is close connected with the name of V.A. Obruchev. Evaluation of Obruchev's activities by Soviet authors disregarded German publications widely. That even their importance
  • , origin and spread of the loess, the Pleistocene glaciation in Siberia and Central Asia, neo-tectonics and exploration of deposits) and characterizes his importance for geography and geology in the past and present.