@misc{Sawicki_Ludwik_(1893–1972)_Materiały_1925,
 author={Sawicki, Ludwik (1893–1972)},
 volume={46},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 journal={Spuścizna prof. Ludwika Sawickiego : teczki archiwalne},
 howpublished={online},
 year={1925},
 year={1934-1935},
 year={1953},
 language={pol},
 type={Text},
 title={Materiały geologiczne z okolic Warszawy},
 URL={http://www.rcin.org.pl/iae/Content/77080/PDF/WA308_90118_A-TA-LS-46-4_Materialy-geologiczn_I.pdf},
 keywords={regional geology -- Poland, Warsaw, mazowieckie voivodeship-region (Poland)},
}