Columbia subject headings:
Soviet Union--History--Revolution, 1917-1921--Sources.
Tula (Russia)--History--Sources.
Tulʹskai︠a︡ oblastʹ (Russia)--History--Sources.
Harvard subject headings:
Tula (Russia)--History--Sources.
Tulʹskai︠a︡ gubernii︠a︡ (R.S.F.S.R.)--History--Sources.
Princeton subject headings:
Tula (Russia)--History--Sources.
Tulʹskai︠a︡ gubernii︠a︡ (R.S.F.S.R.)--History--Sources.