@book{PPN593925297, title = {Geometrische Formenlehre Theil 2}, series = {GDML\_Books}, publisher = {Vieweg}, year = {1869}, language = {de}, url = {http://dml.mathdoc.fr/item/PPN593925297} }
Müller, Eduard. Geometrische Formenlehre Theil 2. GDML_Books (1869), http://gdmltest.u-ga.fr/item/PPN593925297/