@misc{Heweliusz_Jan_(1611-1687)_Johannis,
 author={Heweliusz, Jan (1611-1687)},
 howpublished={online},
 publisher={Szymon Reiniger},
 language={lat},
 title={Johannis Hevelii Epistola, De Cometa, Anno M DC LXXII, Mense, Martio, & Aprili, Gedani Observato : Ad Illustrem [...] Dn. Henricum Oldenburgium, Reg. Societ. Secretarium [...]},
 type={starodruk},
}