@misc{_Jan,
 copyright={Public Domain},
 howpublished={online},
 title={Jan Zaćwilichowski},
 type={Image},
 URL={http://www.rcin.org.pl/Content/138192/PDF/WA058_158506_Zacwilichowski_Jan.pdf},
 keywords={Zaćwilichowski, Jan (1890-1951), zoologists, naturalists, entomologists, textbooks authors, teachers, biologists - Poland - biography},
}