Columbia subject headings:
Catalan language--Grammar, Comparative--German.
Catalan language--Tense.
German language--Grammar, Comparative--Catalan.
German language--Tense.
Harvard subject headings:
Catalan language--Grammar, Comparative--German.
Catalan language--Tense.
German language--Grammar, Comparative--Catalan.
German language--Tense.
Princeton subject headings: