@book{21050,
	author = {BERGMANN, L. and SCHAEFER, C.},
	title = {Lehrbuch der Experimentalphysik.},
	year = {1970.},
	address = {Berlin,},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=21050}
}