@misc{indiciaee005161fd62f,
  title = {Interplanetary magnetic-field variations and substorm activity.},
  author = {Tsurutani, B. T. and Meng, C.-I.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720049308},
  note = {Source identifier: 19720049308}
}