Columbia subject headings:
Polish language--Case.
Polish language--Grammar, Comparative--Spanish.
Spanish language--Case.
Spanish language--Grammar, Comparative--Polish.
Harvard subject headings:
Polish language--Case.
Polish language--Grammar, Comparative--Spanish.
Spanish language--Case.
Spanish language--Grammar, Comparative--Polish.
Princeton subject headings:
Polish language--Case.
Polish language--Grammar, Comparative--Spanish.
Spanish language--Case.
Spanish language--Grammar, Comparative--Polish.