@misc{Siemińska_Jadwiga_(1922–2018)_IVth_1959,
 author={Siemińska, Jadwiga (1922–2018)},
 volume={15 nowa seria},
 number={2},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Kraków},
 journal={Let's protect Our Indigenous Nature},
 howpublished={online},
 year={1959},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 title={IVth Assembly of the Polish Hydrobiologists},
 type={Text},
 URL={http://www.rcin.org.pl/Content/193094/PDF/KR038_187426_r1959-t15-no2_ChPO-Sieminska-39-40.pdf},
}