Columbia subject headings:
Conductors (Music)--Correspondence.
Music--History and criticism.
Scherchen, Hermann, 1891-1966--Correspondence.
Harvard subject headings:
Conductors (Music)--Correspondence.
Conductors (Music)--Germany--Correspondence.
Music--History and criticism
Scherchen, Hermann, 1891-1966--Correspondence.
Princeton subject headings:
Conductors (Music)--Correspondence.
Scherchen, Hermann, 1891-1966--Correspondence.