Columbia subject headings:
Church history--Middle Ages, 600-1500.
Great Britain--Church history--1066-1485.
Investiture--History.
Harvard subject headings:
Church history--Middle Ages, 600-1500
Great Britain--Church history--1066-1485.
Investiture--History.
Princeton subject headings:
Church history--Middle Ages, 600-1500.
Great Britain--Church history--1066-1485.
Investiture--History.