Columbia subject headings:
Church history--Middle Ages, 600-1500.
Civilization, Medieval.
Social history--Medieval, 500-1500.
Sullivan, Richard E. (Richard Eugene), 1921-2005.
Harvard subject headings:
Church history--Middle Ages, 600-1500
Civilization, Medieval.
Social history--Medieval, 500-1500
Sullivan, Richard E. (Richard Eugene), 1921-2005.
Princeton subject headings:
Church history--Middle Ages, 600-1500.
Civilization, Medieval.
Social history--Medieval, 500-1500.
Sullivan, Richard E. (Richard Eugene), 1921-2005.