@misc{indiciaee0b619f856ac,
  title = {Solar irradiance modulation by active regions during 1980},
  author = {Sofia, S. and Schatten, K. and Oster, L.},
  year = {1982},
  url = {https://ntrs.nasa.gov/citations/19820062697},
  note = {Source identifier: 19820062697}
}