@misc{Sawicki_Ludwik_(1893–1972)_P.,
 author={Sawicki, Ludwik (1893–1972)},
 volume={62},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 journal={Spuścizna prof. Ludwika Sawickiego : teczki archiwalne},
 howpublished={online},
 language={pol},
 title={P. Kupka ...},
 type={Text},
 URL={http://rcin.org.pl/Content/77578/PDF/WA308_91817_A-TA-LS-62-27_Kupka_I.pdf},
 keywords={early Neolithic -- Germany, early Neolithic stone objects, Altmark, Saxony-Anhalt (Germany)},
}