Columbia subject headings:
Indians of Central America--Languages--Writing.
Indians of Mexico--Languages--Writing.
Mayan languages--Foreign elements.
Mayan languages--Writing.
Harvard subject headings:
Mayan languages--Foreign elements
Mayan languages--Writing
Princeton subject headings:
Indians of Central America--Languages--Writing.
Indians of Mexico--Languages--Writing.
Mayan languages--Foreign elements.
Mayan languages--Writing.