@misc{indiciae4813f540c608,
  title = {Interstellar helium in interplanetary space},
  author = {Feldman, W. F. and Lange, J. J. and Sherb, F.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710026670},
  note = {Source identifier: 19710026670}
}