Columbia subject headings:
Anthropological linguistics--Soviet Union.
Bilingualism--Soviet Union.
Sociolinguistics--Soviet Union.
Harvard subject headings:
Anthropological linguistics--Soviet Union.
Bilingualism--Soviet Union.
Sociolinguistics--Soviet Union.
Princeton subject headings:
Bilingualism--Soviet Union.
Languages in contact--Soviet Union.
Linguistic minorities--Soviet Union.
Soviet Union--Languages.