Columbia subject headings:
Harvard subject headings:
Cultural property--Protection--Congresses
Indians of North America--Antiquities--Collection and preservation--Congresses.
Indians of North America--Antiquities--Law and legislation--Congresses.
Indians of North America--Government relations--Congresses.
Indians of North America--Legal status, laws, etc.--Congresses.
Princeton subject headings:
Navajo Indians--Antiquities--Congresses.
Navajo Indians--Government relations--Congresses.