Columbia subject headings:
International law and human rights--History--Sources.
Minorities--Legal status, laws, etc.--Sources.
Treaties.
Harvard subject headings:
Human rights
International law and human rights--Sources.
International law.
Minorities--Legal status, laws, etc.
Minorities--Legal status, laws, etc.--History.
Minorities--Legal status, laws, etc.--Sources.
Treaties.
Princeton subject headings: