Columbia subject headings:
Catholic Church--Liturgy.
Gregorian chants.
Manuscripts, Latin (Medieval and modern)--Switzerland--Saint Gall--Facsimiles.
Music--Manuscripts--Facsimiles.
Neumes.
Sequences (Music)
Tropes (Music)
Harvard subject headings:
Catholic Church--Liturgy.
Gregorian chants
Gregorian chants.
Manuscripts, Latin (Medieval and modern)--Switzerland--Saint Gall--Facsimiles.
Music--Manuscripts--Facsimiles.
Neumes.
Sequences (Music)
Tropes (Music)
Princeton subject headings: