Columbia subject headings:
Indians of Mexico--Languages--Statistics.
Indians of Mexico--Population--Statistics.
Harvard subject headings:
Bilingualism--Mexico--Statistics.
Indians of Mexico--Languages--Statistics.
Indians of Mexico--Population--Statistics.
Language surveys--Mexico--Statistics.
Mexico--Languages--Statistics.
Princeton subject headings:
Indians of Mexico--Languages--Statistics.
Mexico--Languages--Statistics.
Mexico--Population--Statistics.
Statistics.