@book{9958,
	author = {Hellwig, Zdzisław.},
	title = {Elementy rachunku ekonomicznego :},
	year = {1978.},
	address = {Warszawa,},
	edition = {Wyd.2 zm.},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=9958}
}