@book{49415,
	author = {Helbig, Gerhard and BUSCHA, Joachim.},
	title = {Deutsche Grammatik :},
	publisher = {Langenscheidt,},
	year = {2005.},
	address = {Berlin :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=49415}
}