@misc{Neumann_Georg_Paul_(1878-_)_Luftschiffe,
 author={Neumann, Georg Paul (1878- )},
 address={Bielefeld},
 address={Leipzig},
 howpublished={online},
 publisher={Velhagen & Klasing},
 language={ger},
 type={książka},
 title={Luftschiffe},
}