@misc{Halma_M._Composition_1813,
 author={Halma, M. and Delambre, M.},
 address={Paris},
 howpublished={online},
 year={1813},
 publisher={Chez Henri Grand},
 language={grc},
 language={fre},
 title={Composition mathématique de Claude Ptolémée. T.1},
 keywords={Ptolemaic system, geocentric system of the universe, mathmatikh syntaxis},
}