@book{26591,
	author = {MAREK, Wiktor and ONYSZKIEWICZ, Janusz},
	title = {Elementy logiki i teorii mnogości w zadaniach /},
	year = {1975.},
	address = {Warszawa,},
	edition = {Wyd.2 popr.},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=26591}
}