@misc{indiciae6894b6d1b983,
  title = {The sun's magnetic sector structure},
  author = {Svalgaard, L. and Wilcox, J. M. and Scherrer, P. H. and Howard, R.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19760020062},
  note = {Source identifier: 19760020062}
}