@book{5531,
	author = {Wojnar, Karol and Wydawnictwo Naukowe PWN},
	title = {Wiertnictwo :},
	publisher = {Wydaw. Naukowe PWN. Oddział,},
	year = {1993.},
	address = {Warszawa ; Kraków :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=5531}
}