@misc{indiciaebea8d4ec3e05,
  title = {Solar modulation of galactic cosmic rays},
  author = {Balasubrahmanyan, V. K. and Boldt, E. and Palmeira, R. A. R.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660020678},
  note = {Source identifier: 19660020678}
}