Columbia subject headings:
Siberia (Russia)--Discovery and exploration.
Harvard subject headings:
Land settlement--Russia (Federation)--Siberia--Sources.
Russian letters--To 1700
Siberia (Russia)--Discovery and exploration--History--Sources.
Siberia (Russia)--History--17th century--Sources.
Siberia (Russia)--Social life and customs--17th century--Sources.
Princeton subject headings: