Columbia subject headings:
Mahler, Gustav, 1860-1911--Political and social views.
Mahler, Gustav, 1860-1911. Knaben Wunderhorn.
Mahler, Gustav, 1860-1911. Lieder und Gesänge aus der Jugendzeit.
Mahler, Gustav, 1860-1911. Symphonies, no. 6,
War songs--History and criticism.
Harvard subject headings:
Mahler, Gustav, 1860-1911--Political and social views.
Mahler, Gustav, 1860-1911. Knaben Wunderhorn.
Mahler, Gustav, 1860-1911. Lieder und Gesänge aus der Jugendzeit.
Mahler, Gustav, 1860-1911. Symphonies, no. 6,
War songs--History and criticism.
Princeton subject headings:
Mahler, Gustav, 1860-1911--Criticism and interpretation.
Mahler, Gustav, 1860-1911. Knaben Wunderhorn.
Mahler, Gustav, 1860-1911. Symphonies, no. 6,
Symphonies--Analysis, appreciation.