Columbia subject headings:
Harvard subject headings:
Italian language--Aspect.
Italian language--Grammar, Comparative--Polish.
Italian language--Tense.
Polish language--Aspect.
Polish language--Grammar, Comparative--Italian.
Polish language--Tense.
Princeton subject headings:
Italian language--Aspect.
Italian language--Grammar, Comparative--Polish.
Italian language--Tense.
Polish language--Aspect.
Polish language--Grammar, Comparative--Italian.
Polish language--Tense.