Columbia subject headings:
Basque language--Grammar, Comparative--Etruscan.
Etruscan language--Grammar, Comparative--Basque.
Harvard subject headings:
Basque language--Grammar, Comparative--Etruscan.
Etruscan language--Grammar, Comparative--Basque.
Princeton subject headings:
Basque language--Grammar, Comparative--Etruscan.
Etruscan language--Grammar, Comparative--Basque.