@misc{Sawicki_Ludwik_(1893–1972)_Marki_1933,
 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},
 year={1933},
 year={1961},
 language={pol},
 title={Marki pod Warszawą},
 type={Text},
 URL={http://www.rcin.org.pl/iae/Content/77088/PDF/WA308_90182_A-TA-LS-48-5_Marki-pod-Warszawa_I.pdf},
 keywords={geology of the site, Marki, Wołomin county, mazowieckie voivodeship (Poland)},
}