Columbia subject headings:
Indians of Mexico--Commerce.
Intercultural communication.
Mayas--Commerce.
Trade routes.
Harvard subject headings:
Acculturation--Central America.
Acculturation--Mexico.
Indians of Central America--Commerce
Indians of Mexico--Commerce.
Trade routes--History.
Princeton subject headings:
Acculturation--Central America.
Acculturation--Mexico.
Indians of Central America--Commerce.
Indians of Mexico--Commerce.
Trade routes--History.