@misc{Kowalska_Krystyna_(1915–1994)_Gabriel_1964,
 author={Kowalska, Krystyna (1915–1994)},
 copyright={Public Domain},
 howpublished={online},
 year={1964},
 type={Image},
 title={Gabriel Brzęk},
 URL={http://rcin.org.pl/miiz/Content/77692/PDF/WA058_90736_Brzek_P1634.pdf},
 keywords={Brzęk, Gabriel (1908-2002), zoologists, historians of science, historians of zoology},
}