Columbia subject headings:
Harvard subject headings:
Libretto--Congresses.
Romani, Felice, 1788-1865--Bibliography.
Romani, Felice, 1788-1865--Congresses.
Princeton subject headings:
Librettists--Italy--Biography--Congresses.
Libretto--Congresses.
Music and literature--Congresses.
Romani, Felice, 1788-1865--Criticism and interpretation--Congresses.