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