@misc{_Adolf,
 copyright={Public Domain},
 howpublished={online},
 type={Image},
 title={Adolf Riedel},
 URL={http://www.rcin.org.pl/Content/153262/PDF/WA058_161199_Riedel-Adolf_port2.pdf},
 keywords={Riedel, Adolf (1930-2010), zoologists, malacologists, academics, collectors and collecting, biologists - Poland - biography},
}