@misc{_Józef,
 copyright={Public Domain},
 howpublished={online},
 title={Józef Kostyrko},
 type={Image},
 URL={http://www.rcin.org.pl/Content/90849/PDF/WA058_90966_Kostyrko_1.pdf},
 keywords={Kostyrko, Józef (1892-1951), foresters, naturalists, academics, environmental activists, biologists - Poland - biography},
}