Columbia subject headings:
Siberia, Western (Russia)--History--Sources.
Tobolʹsk (Russia)--History--Sources.
Harvard subject headings:
Siberia, Western (Russia)--History--Sources.
Tobolʹsk (Russia)--History--Sources.
Princeton subject headings:
Siberia, Western (Russia)--History--Sources.
Tobolʹsk (Russia)--History--Sources.