I - II. Das Mittelalter bis Copernicus. Copernicus.
Die empirischen Methoden Theil 2, GDML_Books, (1894), p. 1 / Harvested from
Access to full text 
@article{PPN595769217+DMDLOG_0002,
     title = {I - II. Das Mittelalter bis Copernicus. Copernicus.},
     booktitle = {Die empirischen Methoden Theil 2},
     series = {GDML\_Books},
     publisher = {Teubner},
     address = {Leipzig},
     year = {1894},
     pages = {1},
     url = {http://dml.mathdoc.fr/item/PPN595769217+DMDLOG_0002}
}

 (éd.). I - II. Das Mittelalter bis Copernicus. Copernicus., dans Die empirischen Methoden Theil 2, GDML_Books,  (1894), p. 1. http://gdmltest.u-ga.fr/item/PPN595769217+DMDLOG_0002/