Columbia subject headings:
Arabic language--Etymology.
Arabic language--Grammar, Comparative.
German language--Etymology.
German language--Grammar, Comparative.
Harvard subject headings:
Arabic language--Etymology.
Arabic language--Grammar, Comparative.
German language--Etymology.
German language--Grammar, Comparative.
Princeton subject headings:
Arabic language--Grammar, Comparative--German.
German language--Etymology.
German language--Grammar, Comparative--Arabic.