Columbia subject headings:
Catholic Church--Clergy--Biography.
Clergy--Germany--Biography.
Kaas, Ludwig, 1881-1952.
Statesmen--Germany--Biography.
Harvard subject headings:
Catholic Church--Clergy--Biography.
Clergy--Germany--Biography
Kaas, Ludwig, 1881-1952.
Statesmen--Germany--Biography.
Princeton subject headings:
Catholic Church--Clergy--Biography.
Clergy--Germany--Biography.
Kaas, Ludwig, 1881-1952.
Statesmen--Germany--Biography.