@misc{Dratnal_Emil_Biologia_1977,
 author={Dratnal, Emil},
 volume={Nr 28B},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 journal={Studia Naturae Ser. B},
 address={Warszawa},
 address={Kraków},
 howpublished={online},
 year={1977},
 publisher={Research Centre for the Protection of Nature of the Polish Academy of Sciences},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 title={Biologia wód Ojcowskiego Parku Narodowego},
 type={Text},
 URL={http://rcin.org.pl./Content/163576/PDF/KR038_181925_r1977-t28B_SN-Dratnal-371-403.pdf},
 keywords={Ojców National Park (Ojców, Poland)},
}