@article{16381,
  author = {Bettye Johnson and Maritoni Litorja and James Butler},
  title = {Preliminary Results of Aperture Area Comparison for Exo-Atmospheric Solar Irradiance},
  year = {2003},
  number = {5151},
  month = {2003-01-01},
  publisher = {SPIE},
  language = {en},
}