Search for: [Subject and Keywords = Spencer, Herbert \(1820\-1903\)] OR [Subject and Keywords = philosophy \(19 c.\)] OR [Subject and Keywords = Spencer, Herbert \(1820\-1903\) \[JHPBN\]] OR [Subject and Keywords = Filozofia \-\- 19 w. \[JHPBN\]] OR [Title = Pierwsze zasady] OR [Title = Pierwsze zasady] OR [Creator = Spencer, Herbert \(1820–1903\)] OR [Creator = Spencer, Herbert \(1820–1903\)]