@misc{Eberhardt_Piotr_(1935–2020)_Prekursorzy_2011, author={Eberhardt, Piotr (1935–2020)}, volume={83}, number={4}, copyright={Rights Reserved - Free Access}, address={Warszawa}, journal={Przegląd Geograficzny}, howpublished={online}, year={2011}, publisher={IGiPZ PAN}, language={pol}, type={Text}, title={Prekursorzy niemieckiej geopolityki = Pioneers of German geopolitics}, URL={http://rcin.org.pl/Content/3494/PDF/WA51_15123_r2011-t83-4_Przeg-Geogr-Eber.pdf}, keywords={anthropogeography, geopolitics, Germany, 18th-19th century}, }