Columbia subject headings:
Aztecs--Industries.
Aztecs--Rites and ceremonies.
Harvard subject headings:
Aztec calendar.
Aztecs--Material culture.
Aztecs--Rites and ceremonies.
Festivals--Mexico--History.
Paper--Mexico.
Princeton subject headings:
Aztec calendar.
Aztecs--Papermaking.
Aztecs--Rites and ceremonies.
Festivals--Mexico--History.
Mexico--Antiquities.