Columbia subject headings:
Biblioteca nazionale (Naples, Italy)--Manuscripts.
Gregorian chants--History and criticism.
Music--Manuscripts--Italy--Naples.
Paleography, Musical.
Harvard subject headings:
Biblioteca nazionale (Naples, Italy)
Gregorian chants--History and criticism.
Music--Manuscripts--Italy--Naples.
Paleography, Musical.
Princeton subject headings:
Gregorian chants--History and criticism.
Music--Manuscripts--Italy--Naples.
Naples. Biblioteca nazionale. Mss.
Paleography, Musical.