@misc{Tomiałojć_Ludwik_(1939–_)_Przyrodnicza_1993,
 author={Tomiałojć, Ludwik (1939– ) and Dyrcz, Andrzej},
 editor={Polish Academy of Sciences. Committee for Nature Conservation},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Kraków},
 howpublished={online},
 year={1993},
 publisher={Institute of Nature Conservation of the Polish Academy of Sciences},
 language={pol},
 type={Text},
 title={Przyrodnicza wartość dużych rzek i ich dolin w Polsce w świetle badań ornitologicznych},
 title={Nature conservation in large river valleys of Poland: an ornithological outlook},
 URL={http://www.rcin.org.pl/Content/117119/PDF/KR038_142953_r1993_OchrPiS-Tomialojc-13-38.pdf},
 keywords={river valleys},
}