@book{PPN59226565X, title = {Gemeine Arithmetik, Allgemeine Arithmetik, Algebra Bd. 1}, series = {GDML\_Books}, publisher = {Hirzel}, address = {Leipzig}, year = {1868}, language = {de}, url = {http://dml.mathdoc.fr/item/PPN59226565X} }
Baltzer, Richard. Gemeine Arithmetik, Allgemeine Arithmetik, Algebra Bd. 1. GDML_Books (1868), http://gdmltest.u-ga.fr/item/PPN59226565X/