@misc{Otęska_Janina_The_1975,
 author={Otęska, Janina},
 volume={31},
 editor={Research Centre for the Protection of Nature of the Polish Academy of Sciences},
 number={5},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 journal={Let's protect Our Indigenous Nature},
 address={Warszawa},
 address={Kraków},
 howpublished={online},
 year={1975},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 title={The school of speleology},
 type={Text},
 URL={http://rcin.org.pl/iop/Content/83673/PDF/KR038_104619_r1975-t31-no5_ChPO-Oteska-73-74.pdf},
}