Columbia subject headings:
Italian language--Relative clauses.
Polish language--Relative clauses.
Harvard subject headings:
Grammar, Comparative and general--Relative clauses.
Italian language--Grammar, Comparative--Polish.
Polish language--Grammar, Comparative--Italian.
Princeton subject headings:
Grammar, Comparative and general--Relative clauses.
Italian language--Grammar, comparative--Polish.
Italian language--Relative clauses.
Polish language--Grammar, comparative--Italian.
Polish language--Relative clauses.