@book{229514,
	author = {Kaufmann, J. E. and Kaufmann, H. W.},
	title = {The medieval fortress},
	publisher = {Da Capo Press},
	year = {2004.},
	address = {Cambridge, MA},
	edition = {1st Da Capo pbk. ed.},
	note = {Originally published: Conshohocken, PA : Combined Pub., 2001.}
}