Columbia subject headings:
Catholic Church--Liturgy--Bibliography.
Manuscripts--United States--Catalogs.
Harvard subject headings:
Catholic Church--Liturgy--Bibliography--Exhibitions.
Catholic Church--Liturgy--Texts--Manuscripts--Exhibitions.
Exhibition catalogs
Manuscripts, Medieval--United States--Exhibitions.
Princeton subject headings:
Catalogs.
Catholic Church--Liturgy--Bibliography.
Manuscripts--United States--Catalogs.
Music--Exhibitions.