Columbia subject headings:
Harvard subject headings:
German language--Spoken German.
German language--Word formation.
Ruoff, Arno. Häufigkeitswörterbuch gesprochener Sprache.
Princeton subject headings:
German language--Spoken German.
German language--Word formation.
Ruoff, Arno. Häufigkeitswörterbuch gesprochener Sprache.