Bartys, J. (1972). Grand duchy of Poznan under Prussion rule: Changes in the economic position of the Jewish population 1815-1848. Year Book / Leo Baeck Institute.

Bartys, Julian. "Grand Duchy of Poznan Under Prussion Rule: Changes in the Economic Position of the Jewish Population 1815-1848." Year Book / Leo Baeck Institute 1972.

Bartys, Julian. "Grand Duchy of Poznan Under Prussion Rule: Changes in the Economic Position of the Jewish Population 1815-1848." Year Book / Leo Baeck Institute, 1972.