Columbia subject headings:
Berg, Alban, 1885-1935--Correspondence.
Berg, Helene, 1885-1976--Correspondence.
Composers--Austria--Correspondence.
Mahler, Alma, 1879-1964--Correspondence.
Wives--Austria--Correspondence.
Harvard subject headings:
Berg, Alban, 1885-1935--Correspondence.
Berg, Helene, 1885-1976--Correspondence.
Composers--Austria--Correspondence
Mahler, Alma, 1879-1964--Correspondence.
Wives--Austria--Correspondence.
Princeton subject headings:
Berg, Alban, 1885-1935--Correspondence.
Berg, Helene, 1885-1976--Correspondence.
Composers--Austria--Correspondence.
Mahler, Alma, 1879-1964--Correspondence.
Wives--Austria--Correspondence.