@misc{_Adolf,
 copyright={Public Domain},
 howpublished={online},
 type={Image},
 title={Adolf Riedel},
 URL={http://rcin.org.pl./Content/153260/PDF/WA058_161198_Riedel-Adolf_port1.pdf},
 keywords={Riedel, Adolf (1930-2010), zoologists, malacologists, academics, collectors and collecting, biologists - Poland - biography},
}