Columbia subject headings:
Minorities--Soviet Union--Congresses.
Nationalism--Soviet Union--Congresses.
Soviet Union--Ethnic relations--Congresses.
Soviet Union--Politics and government--1917-1936--Congresses.
Harvard subject headings:
Minorities--Soviet Union--Congresses.
Nationalism--Soviet Union--Congresses.
Soviet Union--Ethnic relations--Congresses.
Soviet Union--Politics and government--Congresses.
Princeton subject headings:
Minorities--Soviet Union--Congresses.
Nationalism--Soviet Union--Congresses.
Soviet Union--Ethnic relations--Congresses.
Soviet Union--Politics and government--Congresses.