@misc{Solon_Jerzy._Autor_Physico-geographical_2018, author={Solon, Jerzy. Autor}, volume={91}, number={2}, copyright={Creative Commons Attribution BY 4.0 license}, address={Warszawa}, journal={Geographia Polonica}, howpublished={online}, year={2018}, publisher={IGiPZ PAN}, language={eng}, type={Text}, title={Physico-geographical mesoregions of Poland: Digital version of the map in ESRI shp format}, keywords={regionalisation, spatial units, boundaries of regions, Poland}, }