@misc{Sawicki_Ludwik_(1893–1972)_Pustelnik,
 author={Sawicki, Ludwik (1893–1972)},
 volume={48},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 journal={Spuścizna prof. Ludwika Sawickiego : teczki archiwalne},
 howpublished={online},
 language={pol},
 title={Pustelnik I pod Warszawą},
 type={Text},
 URL={http://rcin.org.pl/Content/77092/PDF/WA308_90185_A-TA-LS-48-8_Pustelnik-I-pod-Wars_I.pdf},
 keywords={geology of the site, Pustelnik (Marki, Poland), Marki, Wołomin county, mazowieckie voivodeship (Poland)},
}