@misc{Siemens_Werner_von_(1816-1892)_Die,
 author={Siemens, Werner von (1816-1892)},
 address={Berlin},
 howpublished={online},
 publisher={C. G. Lüderitz'sche Verlagsbuchhandlung A. Charisius},
 language={ger},
 type={książka},
 title={Die electrische Telegraphie},
 keywords={telegrafia},
}