@misc{Gawryszewski_Andrzej_(1939–_)_Ludność_2005, author={Gawryszewski, Andrzej (1939– )}, copyright={Rights Reserved - Free Access}, address={Warszawa}, journal={Monografie - Polska Akademia Nauk. Instytut Geografii i Przestrzennego Zagospodarowania im. Stanisława Leszczyckiego}, howpublished={online}, year={2005}, publisher={PAN IGiPZ}, language={pol}, language={eng}, type={Text}, title={Ludność Polski w XX wieku}, title={Population of Poland in the 20th century}, URL={http://rcin.org.pl./Content/2425/PDF/WA51_13508_r2005-nr5_Monografie.pdf}, keywords={population, Poland, 20th century}, }