@misc{Ambronn_L._Handbuch_1899,
 author={Ambronn, L.},
 address={Berlin},
 howpublished={online},
 year={1899},
 publisher={Verlag von Julius Springer},
 language={ger},
 type={text},
 title={Handbuch der Astronomischen Instrumentenkunde. Bd. 1},
 keywords={astronomical instruments, construction of astronomical instruments},
}