Columbia subject headings:
Indians of Mexico--Languages.
Languages in contact--Mexico.
Linguistic change--Mexico.
Mexico--Languages.
Sociolinguistics--Mexico.
Spanish language--Dialects--Mexico.
Harvard subject headings:
Indians of Mexico--Languages
Languages in contact--Mexico.
Linguistic change--Mexico.
Mexico--Languages
Sociolinguistics--Mexico.
Spanish language--Dialects--Mexico.
Princeton subject headings:
Indians of Mexico--Languages.
Languages in contact--Mexico.
Linguistic change--Mexico.
Mexico--Languages.
Sociolinguistics--Mexico.
Spanish language--Dialects--Mexico.