@misc{Eberhardt_Piotr_(1935–2020)_Zagadnienia_1995, author={Eberhardt, Piotr (1935–2020)}, copyright={Rights Reserved - Free Access}, address={Warszawa}, journal={Zeszyty Instytutu Geografii i Przestrzennego Zagospodarowania PAN}, howpublished={online}, year={1995}, publisher={IGiPZ PAN}, language={pol}, language={eng}, title={Zagadnienia ludnościowe obszaru byłych Prus Wschodnich = Problems of population in area of ex-East Prussia}, type={Text}, URL={http://www.rcin.org.pl/igipz/Content/33475/PDF/WA51_44782_r1995-nr29_Zeszyty-IGiPZ.pdf}, keywords={demography, population, North-Eastern Poland, Kaliningrad District, East Prussia}, }