Columbia subject headings:
Mahler, Gustav, 1860-1911. Symphonies, no. 7--Congresses.
Harvard subject headings:
Mahler, Gustav, 1860-1911. Symphonies, no. 7--Congresses.
Princeton subject headings:
Mahler, Gustav, 1860-1911. Symphonies, no. 7--Congresses.