Naturalized Jews of the Grand Duchy of Posen in 1834 and 1835 an alphabetical list of Jews naturalized in the Grand Duchy of Posen in 1834 and 1835 as publ. in Verzeichniss sämmtlicher naturalisierten Israeliten im Grossherzogthum Posen by Isidor Hirschberg in Bromberg in 1836 - Luft, Edward David (Scholars Press, 1987)