Picryl description: Public domain image of child labor, economic conditions, children workers, exploitation, free to use, no copyright restrictions.
parole di Carlo d'Ormeville ; musica di Luigi Sangermano. (statement of responsibility) U.S. RISM Libretto Project. Legal notice--p. 2. Singers' names not given.
parole di Davide Rabbeno ; musica del maestro Giuseppe Rota ; scritta espressamente pel R. teatro di Parma da rappresentarsi nel carnevale 1862-63. (statement of responsibility) U.S. RISM Libretto Project. Lega More
di Pietro Cossa ; musica del maestro Wenceslao Persichini ; da rappresentarsi nel Politeama Romano la primavera 1874. (statement of responsibility) U.S. RISM Libretto Project. Singers' names not given. Performa More
musica del maestro Guglielmo Branca. (statement of responsibility) U.S. RISM Libretto Project. Legal notice--p. 2. Libretto by Alfredo Morgigni--Stieger. Opernlexikon. Singers' names not given.