Columbia subject headings:
Composers--Italy--14th century--Congresses.
Vocal music--Italy--500-1400--Congresses.
Zachara da Teramo, Antonio--Congresses.
Harvard subject headings:
Composers--Italy--Biography--Congresses.
Vocal music--Italy--14th century--Congresses.
Vocal music--Italy--15th century--Congresses.
Zachara da Teramo, Antonio--Congresses.
Zachara da Teramo, Antonio--Criticism and interpretation--Congresses.
Princeton subject headings:
Composers--Italy--Congresses.
Vocal music--Italy--Congresses.
Zachara da Teramo, Antonio--Criticism and interpretation--Congresses.