@misc{Hass_Ludwik_(1918–2008)_Problematyka_1999,
 author={Hass, Ludwik (1918–2008)},
 volume={31},
 editor={Institute of History of the Polish Academy of Sciences},
 editor={Pultusk Academy of Humanities},
 number={2},
 copyright={Rights Reserved - Free Access},
 journal={Dzieje Najnowsze : [kwartalnik poświęcony historii XX wieku]},
 address={Warszawa},
 howpublished={online},
 year={1999},
 publisher={Wydawnictwo DiG},
 language={pol},
 title={Problematyka badawcza "Archipelagu Gułag"},
 type={Text},
 URL={http://www.rcin.org.pl/Content/45793/PDF/WA303_61730_A507-DN-R-31-2_Hass.pdf},
 keywords={concentration camps - Soviet Union - history, political prisoners - Soviet Union - history},
}