Columbia subject headings:
Russian literature--19th century.
Russian literature--20th century.
Soviet Union--History--Revolution, 1917-1921--Refugees.
Soviet Union--History--Revolution, 1917-1921.
Harvard subject headings:
Russian literature--19th century
Russian literature--20th century
Soviet Union--History--Revolution, 1917-1921--Refugees.
Soviet Union--History--Revolution, 1917-1921.
Princeton subject headings:
Russian literature--19th century.
Russian literature--20th century.
Soviet Union--History--Revolution, 1917-1921--Refugees.
Soviet Union--History--Revolution, 1917-1921.