@book{15721,
	author = {SPIESS, Wolfgang E. and EHINGER, Wolfgang E.},
	title = {Programmierubungen in Fortran /},
	year = {1973.},
	address = {Berlin,},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=15721}
}