@book{PPN592509036, title = {Planimetrie Theil 2}, series = {GDML\_Books}, publisher = {Hirt}, address = {Breslau}, year = {1877}, language = {de}, url = {http://dml.mathdoc.fr/item/PPN592509036} }
Kambly, Ludwig. Planimetrie Theil 2. GDML_Books (1877), http://gdmltest.u-ga.fr/item/PPN592509036/