Columbia subject headings:
Biblioteca musicale L. Feininger--Manuscripts--Exhibitions.
Gregorian chants--Manuscripts--Exhibitions.
Harvard subject headings:
Biblioteca musicale L. Feininger--Catalogs.
Biblioteca musicale L. Feininger--Exhibitions.
Catholic Church--Liturgy--Texts--Exhibitions.
Gregorian chants--Manuscripts--Exhibitions.
Missals--Exhibitions.
Princeton subject headings:
Biblioteca musicale L. Feininger--Catalogs.
Catalogs.
Catholic Church--Hymns--Texts--Exhibitions.
Catholic Church--Liturgy--Texts--Illustrations--Exhibitions.
Catholic Church--Liturgy--Texts--Manuscripts--Exhibitions.
Church music--Catholic Church--Exhibitions.
Gregorian chants--History and criticism--Exhibitions.
Illumination of books and manuscripts, Medieval--Exhibitions.
Illumination of books and manuscripts, Renaissance--Exhibitions.
Pictures.
Service books (Music)--Catholic Church--Exhibitions.