@misc{_Illustriertes_1860,
 volume={B. 2. Birnen},
 editor={Jahn, Friedrich},
 editor={Lucas, Eduard (1816–1882)},
 editor={Oberdieck, Johann Georg Conrad (1794–1880)},
 copyright={Public Domain},
 address={Stuttgart},
 howpublished={online},
 year={1860},
 publisher={Ebner und Seubert},
 language={ger},
 title={Illustriertes Handbuch der Obstkunde. Bd. 2. Birnen},
 type={Text},
 URL={http://rcin.org.pl/Content/148403/PDF/KOR001_183347_1860_Illustriertes-Handbu.pdf},
 keywords={pear varieties, Pyrus sp.},
}