The Sûrya siddhânta : a text-book of Hindu astronomy

@inproceedings{Burgess1977TheSS,
  title={The S{\^u}rya siddh{\^a}nta : a text-book of Hindu astronomy},
  author={Ebenezer Burgess and Phanindralal Gangooly and Prabodh Chandra Sengupta},
  year={1977}
}
The oldest and most important treatise of the post-Christian period of Indian astronomy that has come down to us is the Surya Siddhanta that consists of 14 chapters written in slokas.