Columbia subject headings:
Music--Manuscripts--Facsimiles.
Sacred vocal music--500-1400.
Harvard subject headings:
Manuscripts, Latin--Facsimiles.
Music--Manuscripts--Facsimiles
Part songs, Latin.
Sacred songs, Unaccompanied.
Songs, Latin (Medieval and modern)
Princeton subject headings:
Manuscripts, Latin--Facsimiles.
Music--Manuscripts--Facsimiles.
Part songs, Latin.
Part songs.
Songs, Latin.
Songs.