@misc{Porritt_George_Taylor_(1848–1927)_Melanism_1906,
 author={Porritt, George Taylor (1848–1927)},
 copyright={Public Domain},
 address={London},
 address={(London)},
 journal={Publications of famous biologists - a collection of prints},
 howpublished={online},
 year={1906},
 publisher={[unknown]},
 publisher={(Spottiswoode and Co. Ltd)},
 language={eng},
 type={Text},
 title={Melanism in Yorkshire Lepidoptera},
 URL={http://rcin.org.pl/Content/127091/PDF/WA488_159779_19746_s2253.pdf},
 keywords={Insects - butterflies (Lepidoptera) - melanism phenomenon - near Yorkshire and Lancashire},
}