@book{168395,
	author = {Seefeldt, J�eurgen and Syr�ae, Ludger and Bundesvereinigung Deutscher Bibliotheksverb�eande.},
	title = {Portals to the past and to the future :},
	publisher = {Georg Olms Verlag,},
	year = {2017.},
	address = {Hildesheim:},
	edition = {4th revised and extended edition.}
}