@misc{Eccard_Johann_Georg_von_Epistola,
 author={Eccard, Johann Georg von},
 howpublished={online},
 publisher={apud Io. Friderici Gleditschii},
 language={lat},
 title={Epistola De Numis Quibusdam Explicatu Difficilioribus ...},
 type={stary druk},
 keywords={Eckhart, Johann Georg von (1664-1730), numizmatyka, pieniądz - historia},
}