Search for: [Subject and Keywords = general encyclopedias] OR [Subject and Keywords = Polish encyclopedias] OR [Subject and Keywords = encyklopedie powszechne] OR [Subject and Keywords = encyklopedie polskie] OR [Title = Encyklopedyja powszechna. T. 20, Optymaci.\-Polk.] OR [Title = Encyklopedyja powszechna. T. 20, Optymaci.\-Polk.] OR [Creator = Orgelbrand, Samuel \(1810–1868\)] OR [Creator = Orgelbrand, Samuel \(1810–1868\)]