@misc{indiciae6070719d750f,
  title = {Studies in interplanetary particles},
  author = {Nilsson, C. S. and Southworth, R. B. and Whipple, F. L.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670029881},
  note = {Source identifier: 19670029881}
}