Columbia subject headings:
Calvin, Jean, 1509-1564.
Melanchthon, Philip, 1497-1560.
Zwingli, Ulrich, 1484-1531.
Harvard subject headings:
Calvin, Jean, 1509-1564
Melanchthon, Philip, 1497-1560
Zwingli, Ulrich, 1484-1531
Princeton subject headings: