Columbia subject headings:
Eck, Johann, 1486-1543.
Luther, Martin, 1483-1546.
Reformation--Biography.
Harvard subject headings:
Eck, Johann, 1486-1543
Theologians--Germany--Biography
Princeton subject headings:
Eck, Johann, 1486-1543.
Luther, Martin, 1483-1546.
Reformation--Biography.