Columbia subject headings:
Harvard subject headings:
Communities--Spain--Extremadura.
Languages in contact--Spain--Extremadura.
Portuguese language--Dialects--Spain--Extremadura.
Portuguese language--Spain--Extremadura.
Spanish language--Dialects--Spain--Extremadura.
Spanish language--Spain--Extremadura.
Princeton subject headings:
Languages in contact--Spain--Extremadura.
Portuguese language--Dialects--Spain--Extremadura.
Portuguese language--Spain--Extremadura.
Spanish language--Dialects--Spain--Extremadura.
Spanish language--Spain--Extremadura.