@misc{indiciaea74975efbb19,
  title = {Very high energy cosmic gamma rays.},
  author = {Lieber, M. and Milford, S. N. and Spergel, M. S.},
  year = {1965},
  url = {https://ntrs.nasa.gov/citations/19650039390},
  note = {Source identifier: 19650039390}
}