@misc{Wolf_Rudolf_Handbuch_1892,
 author={Wolf, Rudolf},
 address={Zürich},
 howpublished={online},
 year={1892},
 publisher={Verlag von F. Schulthess},
 language={ger},
 type={text},
 title={Handbuch der Astronomie ihrer Geschichte und Litteratur. Hlbd. 3},
 keywords={astronomical instruments, stellar astronomy, celestial mechanics},
}