@misc{_Jan_[1959],
 copyright={Public Domain},
 howpublished={online},
 year={[1959]},
 type={Image},
 title={Jan Prüffer},
 URL={http://rcin.org.pl/Content/127422/PDF/WA058_109785_Pruffer_Jan.pdf},
 keywords={Prüffer, Jan (1890-1959), zoologists, entomologists, lepidopterologists, Siedlecki, Michał (1873-1940) - students, academics, promoters of science, biologists - Poland - biography},
}