@misc{indiciaeada062ae05b9,
  title = {Cosmic-ray variations and the interplanetary sector structures.},
  author = {Yoshida, S. and Akasofu, S. and Ogita, N.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19720027242},
  note = {Source identifier: 19720027242}
}