Columbia subject headings:
Harvard subject headings:
Central America--Antiquities--Congresses.
City-states--Central America--Antiquities--Congresses.
Extinct cities--Central America--Congresses.
Indians of Central America--Antiquities--Congresses
Mayas--Antiquities--Congresses
Princeton subject headings:
Central America--Antiquities--Congresses.
Indian architecture--Central America--Congresses.
Indian architecture--Mexico--Congresses.
Indian art--Central America--Congresses.
Indian art--Mexico--Congresses.
Maya architecture--Congresses.
Maya art--Congresses.
Mexico--Antiquities--Congresses.