Columbia subject headings:
Aztecs--Rites and ceremonies--Congresses.
Human sacrifice--Central America--Congresses.
Human sacrifice--Mexico--Congresses.
Indians of Mexico--Rites and ceremonies--Congresses.
Mayas--Rites and ceremonies--Congresses.
Harvard subject headings:
Aztecs--Rites and ceremonies--Congresses.
Human sacrifice--Central America--Congresses.
Human sacrifice--Mexico--Congresses.
Indians of Mexico--Rites and ceremonies--Congresses.
Mayas--Rites and ceremonies--Congresses.
Princeton subject headings:
Aztecs--Rites and ceremonies--Congresses.
Human sacrifice--Central America--Congresses.
Human sacrifice--Mexico--Congresses.
Indians of Mexico--Rites and ceremonies--Congresses.
Mayas--Rites and ceremonies--Congresses.