Columbia subject headings:
Don Cossacks--History--20th century.
Russo-Japanese War, 1904-1905--Participation, Cossack.
World War, 1914-1918--Participation, Cossack.
Harvard subject headings:
Don Cossacks--History--20th century.
Russo-Japanese War, 1904-1905--Participation, Cossack.
World War, 1914-1918--Participation, Cossack.
Princeton subject headings: