Éléments d'arithmétique - Bourdon, Pierre Louis Marie, <1779-1854>. (OLS)http://semarc/name/91661 (Bachelier,, 1846)
Keywords: Matematica. (OLS)http://semarc/subject/1227; Aritmetica - Opere anteriori al 1900. (OLS)http://semarc/subject/4038