Columbia subject headings:
Composers--Austria--Correspondence.
Mahler, Alma, 1879-1964--Correspondence.
Schoenberg, Arnold, 1874-1951--Correspondence.
Wives--Austria--Correspondence.
Harvard subject headings:
Princeton subject headings:
Austrians--Correspondence.
Composers--Austria--Correspondence.
Mahler, Alma, 1879-1964--Correspondence.
Schoenberg, Arnold, 1874-1951.