Columbia subject headings:
Mahler, Gustav, 1860-1911--Appreciation--Italy--Congresses.
Mahler, Gustav, 1860-1911--Influence--Congresses.
Music--Italy--20th century--History and criticism--Congresses.
Sprechstimme--Congresses.
Harvard subject headings:
Mahler, Gustav, 1860-1911--Appreciation--Italy--Congresses.
Mahler, Gustav, 1860-1911--Influence--Congresses.
Music--Italy--20th century--History and criticism--Congresses.
Sprechstimme--Congresses.
Princeton subject headings:
Mahler, Gustav, 1860-1911--Appreciation--Italy--Congresses.
Mahler, Gustav, 1860-1911--Influence--Congresses.
Music--Italy--20th century--History and criticism--Congresses.
Sprechstimme--Congresses.