Columbia subject headings:
Luther, Martin, 1483-1546--Congresses.
Melanchthon, Philip, 1497-1560--Congresses.
Reformation--Germany--Historiography--Congresses.
Harvard subject headings:
Luther, Martin, 1483-1546
Melanchthon, Philip, 1497-1560
Reformation--Congresses
Princeton subject headings:
Luther, Martin, 1483-1546--Congresses.
Melanchthon, Philip, 1497-1560--Congresses.
Reformation--Congresses.
Theology--History--16th century--Congresses.