Columbia subject headings:
Caucasus--Description and travel.
Eastern question (Central Asia)
Finland--Description and travel.
Soviet Union--Description and travel.
Soviet Union--Economic conditions.
Harvard subject headings:
Caucasus--Description and travel.
Eastern question (Central Asia)
Finland--Description and travel.
Russia--Description and travel.
Russia--Economic conditions.
Siberia (Russia)--Description and travel.
Soviet Union--Description and travel.
Soviet Union--Economic conditions.
Princeton subject headings: