@misc{indiciaefdab4a356ada,
  title = {Equator-pole differences in the solar chromosphere from Lyman-continuum data.},
  author = {Vernazza, J. E. and Noyes, R. W.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730032231},
  note = {Source identifier: 19730032231}
}