Columbia subject headings:
Cossacks--History--20th century.
Kommunisticheskai͡a partii͡a Sovetskogo Soi͡uza--Party work.
Soviet Union--History--Revolution, 1917-1921.
Harvard subject headings:
Cossacks.
Kommunisticheskai͡a partii͡a Sovetskogo Soi͡uza--Party work.
Soviet Union. Raboche-Krestʹi︠a︡nskai︠a︡ Krasnai︠a︡ Armii︠a︡--Recruiting, enlistment, etc.
Ukraine--History--1917---Sources.
Princeton subject headings: