Columbia subject headings:
Dialectology.
Europe--Languages--Variation.
Grammar, Comparative and general--Relative clauses.
Grammar, Comparative and general--Syntax.
Language and languages--Variation.
Typology (Linguistics)
Harvard subject headings:
Dialectology.
Europe--Languages--Variation.
Grammar, Comparative and general--Relative clauses.
Grammar, Comparative and general--Syntax.
Language and languages--Variation
Typology (Linguistics)
Princeton subject headings: