@misc{_Kazimierz,
 copyright={Public Domain},
 howpublished={online},
 title={Kazimierz Petrusewicz},
 type={Image},
 URL={http://rcin.org.pl/Content/132975/PDF/WA058_152432_Petrusewicz_Kazimierz.pdf},
 keywords={Petrusewicz, Kazimierz (1906-1982), zoologists, ecologists, academics, biologists - Poland - biography},
}