@misc{indiciaecf5bf33fe060,
  title = {Abundance variations in solar active regions},
  author = {Strong, K. T. and Lemen, J. R. and Linford, G. A.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910044900},
  note = {Source identifier: 19910044900}
}