@book{17484,
	author = {SIEGFRIED, H. J.},
	title = {Od teorii mnogości do algebry logiki /},
	year = {1977.},
	address = {Warszawa,},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=17484}
}