@article{10560,
  author = {T. Ayres and L. Testerman},
  title = {The center-to-limb behavior of Ca I lambda 6573 and Ca II lambda 7324},
  year = {1978},
  journal = {Solar Physics},
  volume = {60},
  pages = {19-29},
  url = {http://articles.adsabs.harvard.edu/full/1978SoPh...60...19.},
  note = {JILA Pub. 1743},
}