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| Keywords: POL machina rachunkowa Staffla.jpg PL Machina rachunkowa Izraela Abrahama Staffela 1842 premiera 1845 TYGODNIK ILUSTROWANY 1863 http //www bilp uw edu pl/ti/1863/foto/n207 htm 1863 author PD-old-70 Izrael Abraham Staffel Museum of Technology in Warsaw Inventions Mechanical calculators Tygodnik Ilustrowany | ||||
