Columbia subject headings:
Composers--Germany--Congresses.
Hartmann, Karl Amadeus, 1905-1963--Congresses.
Harvard subject headings:
Composers--Germany--Congresses.
Hartmann, Karl Amadeus, 1905-1963--Congresses.
Princeton subject headings:
Composers--Germany--Congresses.
Hartmann, Karl Amadeus, 1905-1963--Criticism and interpretation--Congresses.
Music--History and criticism--Congresses.