Columbia subject headings:
German language--Particles--Congresses.
German language--Spoken German--Congresses.
Oral communication--Congresses.
Orality--Congresses.
Harvard subject headings:
German language--Particles--Congresses.
German language--Spoken German--Congresses.
Oral communication--Congresses
Orality--Congresses.
Princeton subject headings:
German language--Particles--Congresses.
German language--Spoken German--Congresses.
Oral communication--Congresses.
Orality--Congresses.