Columbia subject headings:
Language policy--Soviet Union--Congresses.
Russian language--Study and teaching--Foreign speakers--Congresses.
Soviet Union--Languages--Political aspects--Congresses.
Harvard subject headings:
Language policy--Soviet Union--Congresses.
Russian language--Study and teaching--Foreign speakers--Congresses.
Soviet Union--Languages--Political aspects--Congresses.
Princeton subject headings:
Language policy--Soviet Union--Congresses.
Russian language--Study and teaching--Foreign students--Congresses.
Soviet Union--Languages--Political aspects--Congresses.