@book{40061,
	author = {ZIEGLER, Robert L.},
	title = {Linux firewalls /},
	publisher = {"Robomatic",},
	year = {2001.},
	series = {Biblioteka Problemów ;},
	address = {Wrocław :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=40061}
}