@misc{Esper_Eugen_Johann_Christoph_(1742–1810)_Supplementband_1789,
 author={Esper, Eugen Johann Christoph (1742–1810) and Walther, Wolfgang (17..-17..). Wyd},
 editor={Walther, Wolfgang (17..-17..). Wyd},
 copyright={Public Domain},
 address={Erlangen},
 howpublished={online},
 year={1789 (cz. 1-2, 3-4), 1794 (cz. 5-6)},
 publisher={im Verlage Wolfgang Walthers},
 language={ger},
 title={Supplementband der europaischen Schmetterlinge. Cz. 1-2, 3-4, 5-6},
 URL={http://rcin.org.pl./Content/56190/PDF/WA058_74418_K5048-7_Schmett-Abbild-Suppl.pdf},
 keywords={early works to 1800, early printed books, Lepidoptera, butterflies},
}