@misc{Korschelt_Eugen_(1858–1946)_Lehrbuch_1902,
 author={Korschelt, Eugen (1858–1946) and Heider, Karl (1856–1935)},
 copyright={Public Domain},
 address={Jena},
 howpublished={online},
 year={1902},
 publisher={Verlag von Gustav Fischer},
 language={ger},
 title={Lehrbuch der vergleichenden entwicklungsgeschichte der wirbellosen thiere},
 type={Text},
 URL={http://rcin.org.pl/Content/161543/PDF/WA488_195147_2686_Korschelt-Heider-Lehrbuch.pdf},
 keywords={Invertebrates - Evolution, Animals - (textbook), Invertebrate evolution - comparative history - eggs, sperm - spermatogenesis - fertilization},
}