@book{17906,
	author = {SŁUPECKI, Jerzy and HAŁKOWSKA, Katarzyna},
	title = {Logika i teoria mnogości /},
	year = {1978.},
	address = {Warszawa,},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=17906}
}