Columbia subject headings:
Russian language--History--20th century.
Russian language--Social aspects.
Russian language--Usage.
Harvard subject headings:
Russian language--20th century--History.
Russian language--Political aspects.
Russian language--Social aspects.
Russian language--Usage.
Soviet Union--Politics and government--1985-1991.
Princeton subject headings:
Russian language--20th century--History.
Russian language--Political aspects.
Russian language--Usage.
Soviet Union--Politics and government--1985-1991.