Columbia subject headings:
Irrigation--Spain--Terminology.
Spanish language--Dialects--Spain--Aragon--Glossaries, vocabularies, etc.
Spanish language--Dialects--Spain--La Rioja--Glossaries, vocabularies, etc.
Spanish language--Dialects--Spain--Navarre--Glossaries, vocabularies, etc.
Harvard subject headings:
Linguistic geography.
Spanish language--Dialectology.
Princeton subject headings: