@misc{Foto_"Ursus"_Pl._Trzech_Krzyży_9_[Warszawa]_Zygmunt,
 author={Foto "Ursus" Pl. Trzech Krzyży 9 [Warszawa]},
 copyright={Public Domain},
 howpublished={online},
 title={Zygmunt Mokrzecki - portrait},
 type={Image},
 URL={http://www.rcin.org.pl/Content/72911/WA058_88623_Mokrzecki_1935.pdf},
 keywords={Mokrzecki, Zygmunt (1865-1936), zoologists, academics, entomologists - Poland - 19th century, biologists - Poland - biography},
}