Columbia subject headings:
Indians of Mexico--Languages--Writing--Congresses.
Mayan languages--Writing--Congresses.
Nahuatl language--Writing--Congresses.
Harvard subject headings:
Indians of Central America--Languages--Writing
Indians of Mexico--Languages--Writing
Mayan languages--Writing--Congresses.
Nahuatl language--Writing--Congresses.
Princeton subject headings:
Indians of Central America--Languages--Writing.
Indians of Mexico--Languages--Writing.