@misc{Diels_Ludwig_(1874–1945)_Pflanzengeographie_1929,
 author={Diels, Ludwig (1874–1945)},
 copyright={Public Domain},
 address={Berlin},
 address={Leipzig},
 howpublished={online},
 year={1929},
 publisher={Walter de Gruyter & Co.},
 language={ger},
 title={Pflanzengeographie},
 type={Text},
 URL={http://www.rcin.org.pl/Content/193147/PDF/KR171_221590_Diels-1929_Pflanzengeographie.pdf},
}