Columbia subject headings:
Catholic Church--Relations--Lutheran Church.
Lord's Supper and Christian union.
Lord's Supper--Catholic Church.
Lord's Supper--Lutheran Church.
Lutheran Church--Relations--Catholic Church.
Harvard subject headings:
Catholic Church--Relations--Lutheran Church.
Lord's Supper and Christian union.
Lord's Supper--Catholic Church
Lord's Supper--Lutheran Church
Lutheran Church--Relations--Catholic Church
Princeton subject headings:
Catholic Church--Relations--Lutheran Church.
Lord's Supper and Christian union.
Lord's Supper--Catholic Church.
Lord's Supper--Lutheran Church.
Lutheran Church--Relations--Catholic Church.