Columbia subject headings:
Gropius, Walter, 1883-1969.
Mahler, Alma, 1879-1964.
Mahler, Gustav, 1860-1911.
Werfel, Franz, 1890-1945.
Harvard subject headings:
Gropius, Walter, 1883-1969.
Mahler, Alma, 1879-1964
Mahler, Gustav, 1860-1911.
Werfel, Franz, 1890-1945.
Princeton subject headings: