• 17 Books
• 1 Music Scores
• 1 Videos, Slides, Films

• 12 Operas
• 5 Librettos
• 3 Composers
• 3 Correspondence
• 3 Opera
• 2 Aïda
• 2 Falstaff
• 2 Otello
• 2 Simon Boccanegra
• 2 Trovatore
• 1 Ballo in maschera
• 1 Bioto, Arrigo, 1842-1918
• 1 Boito, Arrigo, 1842-1918
• 1 Carlos, Prince of Asturias, 1545-1568
• 1 Don Carlos
• 1 Falstaff, John, Sir (Fictitious character)
• 1 Forza del destino
• 1 Librettists
• 1 Macbeth
• 1 Othello (Fictitious character from Shakespeare)
• 1 Ricordi, Giulio, 1840-1912
• 1 Rigoletto
• 1 Traviata

• 5 Piave, Francesco Maria, 1810-1876
• 4 Boito, Arrigo, 1842-1918
• 4 Porter, Andrew, 1928-2015
• 3 Busch, Hans, 1914-1996
• 3 Shakespeare, William, 1564-1616
• 2 Cammarano, Salvatore, 1801-1852
• 2 Fenton, James, 1949-
• 2 García Gutiérrez, Antonio, 1813-1884
• 2 Ghislanzoni, Antonio, 1824-1893
• 2 Tracey, Edmund
• 1 Batchelor, Jennifer
• 1 Conati, Marcello
• 1 Du Locle, Camille, 1832-1903
• 1 Dumas, Alexandre, 1824-1895
• 1 English National Opera
• 1 Hammond, Tom, 1908 or 1909-1981
• 1 Hugo, Victor, 1802-1885
• 1 Kultur International Films
• 1 Macfarren, Natalia, approximately 1827-1916
• 1 Maffei, Andrea, 1798-1885
• 1 Medici, Mario
• 1 Méry, Joseph, 1798-1865
• 1 Osborne, Charles, 1927-2017
• 1 Pickup, Ronald

• 13 Italian
• 1 French
• 1 Undetermined

• 4 Italy

• 11 Librettos
• 3 Correspondence
• 3 Drama
• 2 librettos (documents for music)
• 1 Operas
• 1 Vocal scores with piano

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