Columbia subject headings:
Berg, Alban, 1885-1935--Correspondence.
Composers--Correspondence.
Schoenberg, Arnold, 1874-1951--Correspondence.
Webern, Anton, 1883-1945--Correspondence.
Harvard subject headings:
Berg, Alban, 1885-1935--Correspondence.
Composers--Correspondence
Schoenberg, Arnold, 1874-1951--Correspondence.
Webern, Anton, 1883-1945--Correspondence.
Princeton subject headings:
Berg, Alban, 1885-1935--Correspondence.
Composers--Correspondence.
Personal correspondence.
Schoenberg, Arnold, 1874-1951--Correspondence.
Webern, Anton, 1883-1945--Correspondence.