Joachim Neubert
German National Library of Economics
Leibniz Information Centre for Economics (ZBW)
Phone +49 40 428 34-462 E-Mail: j.neubert(at) zbw.eu
Adrian Pohl
North Rhine-Westphalian Library Service Center (hbz)
Phone +49 221 400 75-235 E-Mail: swib(at)hbz-nrw.de