Columbia subject headings:
Books of hours--Bibliography.
Catholic Church--Bibliography.
Catholic Church--Liturgy--Bibliography.
Incunabula--Bibliography.
Harvard subject headings:
Books of hours--Bibliography.
Catholic Church--Bibliography.
Devotional literature--Bibliography.
Early printed books--16th century.
Incunabula--Bibliography.
Mary, Blessed Virgin, Saint--Devotion to--Bibliography.
Princeton subject headings:
Books of hours--Bibliography.
Catholic Church--Bibliography.
Incunabula--Bibliography.