@misc{indiciae882513d76d85,
  title = {Interplanetary sector structure - 1970-1972},
  author = {Fairfield, D. H. and Ness, N. F.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19750032356},
  note = {Source identifier: 19750032356}
}