@misc{Sawicki_Ludwik_(1893–1972)_Świdry,
 author={Sawicki, Ludwik (1893–1972)},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 journal={Negatywy szklane ze spuścizny Prof. Ludwika Sawickiego},
 howpublished={online},
 language={pol},
 title={Świdry Wielkie : rzeka Świder},
 type={Image},
 keywords={regional natural environment -- Poland, Świdry Wielkie (Otwock, Poland), Otwock, Masovian voivodeshiip (Poland), Świder Valley (Poland)},
}