Columbia subject headings:
Breviaries--Bibliography.
Catholic Church--Liturgy--Bibliography.
Incunabula--Bibliography.
Missals--Bibliography.
Propers (Liturgy)--Bibliography.
Harvard subject headings:
Breviaries--Bibliography--Catalogs.
Catholic Church--Liturgy--Texts--Bibliography--Catalogs.
Missals--Bibliography--Catalogs.
Propers (Liturgy)--Bibliography--Catalogs.
Princeton subject headings:
Breviaries--Bibliography--Catalogs.
Catholic Church--Liturgy--Bibliography--Catalogs.
Missals--Bibliography--Catalogs.
Propers (Liturgy)--Bibliography--Catalogs.