@misc{indiciae8b97ba7304d2,
  title = {Interpretation of cosmic ray composition - The path length distribution},
  author = {Protheroe, R. J. and Ormes, J. F. and Comstock, G. M.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19810059464},
  note = {Source identifier: 19810059464}
}