@misc{indiciae996b7d5e15ad,
  title = {Spectra-spectroheliograph observations.},
  author = {Title, A. M. and Andelin, J. P., Jr.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19720029647},
  note = {Source identifier: 19720029647}
}