image is a derivative work of the following images: File:Polska_hydrografia.jpg licensed with Cc-by-sa-3.0-migrated, GFDL 2009-01-26T05:16:33Z Mareklug 1113x1026
image is a derivative work of the following images: File:Polska_hydrografia2.jpg licensed with GFDL, GFDL/en 2006-04-09T11:11:08Z Krzysiu Jarzyna 1113x1026
image is a derivative work of the following images: File:Polska_hydrografia2.jpg licensed with GFDL, GFDL/en 2006-04-09T11:11:08Z Krzysiu Jarzyna 1113x1026