Columbia subject headings:
Aesthetics, German--20th century--Congresses.
Aesthetics--Germany (East)--Congresses.
Harvard subject headings:
Aesthetics, German--20th century--Congresses.
Aesthetics--Congresses
Aesthetics--Germany (East)--Congresses.
Princeton subject headings:
Aesthetics, German--Germany (East)--20th century.
Art criticism--Germany (East).
Criticism--Germany (East).