@misc{indiciae001e48269db9,
  title = {Interstellar helium in interplanetary space},
  author = {Feldman, W. C. and Lange, J. J. and Scherb, F.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730002087},
  note = {Source identifier: 19730002087}
}