Columbia subject headings:
Russians--Foreign countries--History--20th century.
Russians--Foreign countries--Intellectual life--20th century.
Harvard subject headings:
Russia (Federation)--Emigration and immigration--History.
Russia--Emigration and immigration--History.
Russians--Foreign countries--History.
Russians--Foreign countries--Intellectual life--20th century.
Soviet Union--Emigration and immigration--History.
Princeton subject headings:
Russia (Federation)--Emigration and immigration--History.
Russia--Emigration and immigration--History.
Russians--Foreign countries--History.
Russians--Foreign countries--Intellectual life--20th century.
Soviet Union--Emigration and immigration--History.