Columbia subject headings:
Mahler, Gustav, 1860-1911--Criticism and interpretation--Congresses.
Mahler, Gustav, 1860-1911. Symphonies, no. 8,
Harvard subject headings:
Mahler, Gustav, 1860-1911--Congresses.
Mahler, Gustav, 1860-1911. Symphonies, no. 8,--Congresses.
Princeton subject headings:
Mahler, Gustav, 1860-1911--Criticism and interpretation--Congresses.
Mahler, Gustav, 1860-1911. Symphonies, no. 8,