@misc{Mikuszewski_Jerzy_The_1975,
 author={Mikuszewski, Jerzy},
 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 protection of caves and karst areas in France},
 type={Text},
 URL={http://rcin.org.pl/iop/Content/137407/PDF/KR038_167374_r1975-t31-no5_ChPO-Mikuszewski-76-78.pdf},
 keywords={geology, inanimate nature conservation, caves, France - caves},
}