@book{PPN595769217, title = {Die empirischen Methoden Theil 2}, series = {GDML\_Books}, publisher = {Teubner}, address = {Leipzig}, year = {1894}, language = {de}, url = {http://dml.mathdoc.fr/item/PPN595769217} }
Herz, Norbert. Die empirischen Methoden Theil 2. GDML_Books (1894), http://gdmltest.u-ga.fr/item/PPN595769217/