Columbia subject headings:
Minorities--Russia--History.
Russia, Western--History.
Russia--Boundaries--Europe--History.
Russia--Ethnic relations--History.
Harvard subject headings:
Minorities--Russia--History.
Russia, Western--History.
Russia--Ethnic relations--History.
Princeton subject headings:
Minorities--Russia--History.
Russia, Western--History.
Russia--Boundaries--Europe--History.
Russia--Ethnic relations--History.