@misc{Littrow_Joseph_Johann_von_(1781-1840)_Vorlesungen,
 author={Littrow, Joseph Johann von (1781-1840)},
 howpublished={online},
 publisher={J. G. Heubner},
 language={ger},
 type={książka},
 title={Vorlesungen über Astronomie. T. 1},
 keywords={astronomia},
}