@misc{Darwin_Charles_Robert_(1809–1882)_The_[po,
 author={Darwin, Charles Robert (1809–1882)},
 copyright={Public Domain},
 address={Akron (Ohio)},
 journal={International Science Library},
 howpublished={online},
 year={[po 1872]},
 publisher={The Werner Company},
 language={eng},
 title={The origin of species by means of natural selection, or, The preservation of favored races in the struggle for life. Vol. 2},
 type={Text},
 URL={http://rcin.org.pl/Content/130750/PDF/WA488_160538_201249-2_Darwin-Origin-of-species.pdf},
 keywords={Evolution, Natural history, Species origin - hybridism - geological register - organic research - morphology},
}