@misc{Sowa_Ryszard_Ephemeroptera_1992,
 author={Sowa, Ryszard},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Kraków},
 howpublished={online},
 year={1992},
 publisher={Nature Protection Research Centre of the Polish Academy of Sciences},
 language={pol},
 title={Ephemeroptera},
 type={Text},
 URL={http://rcin.org.pl/Content/171220/PDF/KR038_181706_r1992_CzLZ-Sowa-97-101.pdf},
 keywords={Red List, animals - threatened species, Ephemeroptera},
}