Columbia subject headings:
Former Soviet republics--Languages--Law and legislation.
Language and culture--Former Soviet republics.
Language and culture--Soviet Union.
Language policy--Former Soviet republics.
Language policy--Soviet Union.
Sociolinguistics--Former Soviet republics.
Sociolinguistics--Soviet Union.
Soviet Union--Languages--Law and legislation.
Harvard subject headings:
Former Soviet republics--Languages--Law and legislation.
Language and culture--Former Soviet republics.
Language and culture--Soviet Union.
Language policy--Former Soviet republics.
Language policy--Soviet Union.
Sociolinguistics--Former Soviet republics.
Sociolinguistics--Soviet Union.
Soviet Union--Languages--Law and legislation.
Princeton subject headings:
Perestroĭka--Social aspects.
Russian language--Political aspects.
Soviet Union--Economic policy--1986-1991.