@misc{Ejsmont_Leopold_O_[ok.,
 author={Ejsmont, Leopold and Janicki, Constantin (1876–1932)},
 copyright={Public Domain},
 address={[unknown]},
 journal={Publications of famous biologists - a collection of prints},
 howpublished={online},
 year={[ok. 1931]},
 publisher={[unknown]},
 language={pol},
 type={Text},
 title={O dwóch rodzajach Schistosomatidae z ptaków},
 URL={http://rcin.org.pl/Content/156811/PDF/WA488_190039_19746_s1311.pdf},
 keywords={Flukes dioecious - occurrence in birds, Flukes - systematic categories},
}