@book{23677,
	title = {Logika formalna :},
	publisher = {Państ. Wydaw. Naukowe,},
	year = {1987.},
	address = {Warszawa :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=23677}
}