@misc{Rádl_Emanuel_(1873–1942)_Geschichte_1913,
 author={Rádl, Emanuel (1873–1942)},
 copyright={Public Domain},
 address={Leipzig},
 howpublished={online},
 year={1913},
 publisher={Verlag von Wilhelm Engelmann},
 language={ger},
 title={Geschichte der biologischen theorien in der neuzeit. 1. Teil},
 type={Text},
 URL={http://rcin.org.pl/Content/147638/PDF/WA488_182823_1337_Radl-Biol-Theor.pdf},
 keywords={History of zoology, Biological theories},
}