Columbia subject headings:
Harvard subject headings:
Indians of North America--Government relations--Congresses.
Indians of North America--Legal status, laws, etc.--Congresses.
Indians of North America--Legal status, laws, etc.--Oklahoma--Congresses.
Indians of North America--Oklahoma--Government relations--Congresses.
Princeton subject headings:
Indians of North America--Government relations--Congresses.
Indians of North America--Legal status, laws, etc.--Congresses.
Indians of North America--Oklahoma--Congresses.
Sovereignty--Congresses.
Tribes--United States--Congresses.