Columbia subject headings:
Indians of Mexico--Languages.
Language and languages.
Languages in contact--Mexico.
Harvard subject headings:
Indians of Mexico--Languages--Study and teaching--History.
Language and languages
Languages in contact--Mexico.
Linguistics--Mexico--History.
Missions--Linguistic work--Mexico--History.
Sociolinguistics--Mexico--History.
Princeton subject headings:
Indians of Mexico--Languages--History.
Indians of Mexico--Languages--Study and teaching--History.
Languages in contact--Mexico.
Linguistics--Mexico--History.
Missions--Linguistic work--Mexico--History.
Sociolinguistics--Mexico--History.