@misc{Erman_Adolph_Briefweschel_1852,
 author={Erman, Adolph},
 address={Leipzig},
 howpublished={online},
 year={1852},
 publisher={Avenarius u. Mendelssohn},
 language={ger},
 title={Briefweschel zwischen W. Olbers und F. W. Bessel. Bd. 1},
 keywords={astronomical correspondence, Olbers and Bessel correspondence, correspondence since 1804 for 1815},
}