Columbia subject headings:
Catholic Church--Relations--Lutheran Church.
Ignatius, of Loyola, Saint, 1491-1556.
Luther, Martin, 1483-1546.
Lutheran Church--Relations--Catholic Church.
Harvard subject headings:
Catholic Church--Relations--Lutheran Church.
Ignatius, of Loyola, Saint, 1491-1556
Luther, Martin, 1483-1546
Lutheran Church--Relations--Catholic Church
Princeton subject headings: