Columbia subject headings:
Catholic Church--Ambrosian rite--History.
Catholic Church--Liturgy--History.
Catholic Church. Archdiocese of Milan (Italy)--History.
Church history--Middle Ages, 600-1500.
Church history--Primitive and early church, ca. 30-600.
Milan (Italy)--Church history.
Harvard subject headings:
Catholic Church--Ambrosian rite--History.
Catholic Church--Liturgy--History--Middle Ages, 600-1500.
Catholic Church. Archdiocese of Milan (Italy)--History.
Church history--Middle Ages, 600-1500
Church history--Primitive and early church, ca. 30-600
Church history--Primitive and early church, ca. 30-600.
Milan (Italy)--Church history.
Princeton subject headings: