Columbia subject headings:
Giacosa, Giuseppe, 1847-1906--Manuscripts--Facsimiles.
Illica, Luigi, 1857-1919--Manuscripts--Facsimiles.
Operas--Librettos.
Harvard subject headings:
Giacosa, Giuseppe, 1847-1906--Manuscripts--Facsimiles.
Illica, Luigi, 1857-1919--Manuscripts--Facsimiles.
Libretto.
Operas--Librettos
Princeton subject headings:
Facsimiles.
Librettos.
Manuscripts, Italian--Facsimiles.
Operas--Librettos.
Puccini, Giacomo, 1858-1924. Tosca.