@book{219357,
	author = {Berkhofer, Robert F., and ebrary, Inc.},
	title = {Day of reckoning},
	publisher = {University of Pennsylvania Press,},
	year = {c2004.},
	series = {The Middle Ages series},
	address = {Philadelphia, Pa. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10748823}
}