@misc{Ludorff_Albert_(1848-_)_Die,
 author={Ludorff, Albert (1848- )},
 address={Münster i. W.},
 address={Paderborn},
 howpublished={online},
 publisher={Kommissions Verlag von Heinrich Stenderhoff},
 publisher={Verlagbuchhandlung},
 language={ger},
 title={Die Bau- und Kunstdenkmäler des Kreises Altena},
 type={książka},
}