@misc{Napiersky_Jakob_Gottlieb_Leonhard_(1819-1890)_Die,
 author={Napiersky, Jakob Gottlieb Leonhard (1819-1890)},
 address={Riga},
 howpublished={online},
 publisher={N. Kymmel's Buchhandlung},
 language={ger},
 type={książka},
 title={Die Erbebücher der Stadt Riga 1384-1579},
}