Columbia subject headings:
Harvard subject headings:
Rossiĭskai︠a︡ sot︠s︡ial-demokraticheskai︠a︡ rabochai︠a︡ partii︠a︡--Party work.
World War, 1914-1918--Caucasus.
Princeton subject headings:
Caucasus--History.
Russia--History--Nicholas II, 1894-1917.
World War, 1914-1918--Soviet Union.