Columbia subject headings:
Europe, Eastern--Languages--Political aspects.
Language policy--Europe, Eastern.
Slavic languages, Southern.
Slavic languages, Western.
Slavic languages--Standardization.
Harvard subject headings:
Europe, Eastern--Languages--Political aspects.
Language policy--Europe, Eastern.
Slavic languages, Southern--20th century.
Slavic languages, Western--20th century.
Slavic languages--Standardization.
Princeton subject headings:
Language planning--Communist countries.
Slavic languages--Social aspects.
Sociolinguistics--Communist countries.