@book{8506,
	author = {POLYA, G.},
	title = {Vom Lösen Mathematischer Aufgaben. Band 2 /},
	year = {1967.},
	address = {Stuttgart,},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=8506}
}