@book{240750,
	author = {Pollard, Tony. and ebrary, Inc.},
	title = {Bastions and barbed wire},
	publisher = {Boston [Mass.] :},
	year = {2008.},
	address = {Leiden :},
	note = {"Also published as volume four of the Journal of conflict archaeology"--P. facing t.p.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10461207}
}