Columbia subject headings:
Central America--Antiquities--Congresses.
Maya pottery--Congresses.
Mexico--Antiquities--Congresses.
Harvard subject headings:
Indian pottery--Central America--Congresses.
Indian pottery--Mexico--Congresses.
Maya pottery--Congresses.
Princeton subject headings:
Central America--Antiquities--Congresses.
Indian pottery--Central America--Congresses.
Indian pottery--Mexico--Congresses.
Maya pottery--Congresses.
Mexico--Antiquities--Congresses.