Columbia subject headings:
Harvard subject headings:
Indians--Industries--History--Congresses.
Metal-work--America--History--Congresses.
Metallurgy--America--History--Congresses.
Princeton subject headings:
Indians of Central America--History--Congresses.
Indians of Mexico--History--Congresses.
Indians of South America--History--Congresses.
Metal-work--Latin America--History--Congresses.
Metallurgy--Latin America--History--Congresses.