@misc{indiciaeb35a645de4d4,
  title = {Derivation and statistical comparison of various analytical techniques which define the location of reference horizons in the earth's horizon radiance profile},
  author = {Thomas, J. R.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670014384},
  note = {Source identifier: 19670014384}
}