@misc{Mettig_Constantin_(1851-1914)_Geschichte,
 author={Mettig, Constantin (1851-1914)},
 address={Riga},
 howpublished={online},
 publisher={Verlag von Jonck & Poliewsky},
 language={ger},
 type={książka},
 title={Geschichte der Stadt Riga},
 keywords={Ryga (Łotwa)},
}