@misc{Watson_James_C._Theoretical_1868,
 author={Watson, James C.},
 address={Philadelphia},
 howpublished={online},
 year={1868},
 publisher={J. B. Lippincot and CO.},
 language={eng},
 title={Theoretical astronomy relating to the motions of the heavenly bodies},
 keywords={theoretical astronomy, motions of celestial bodies},
}