@misc{indiciaebaff4513a351,
  title = {Interplanetary magnetic field mapping and study of sector evolution},
  author = {Ness, N. F. and Schatten, K. H. and Wilcox, J. M.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670027064},
  note = {Source identifier: 19670027064}
}