@misc{indiciae106acd75f63a,
  title = {Celestial diffuse gamma radiation above 30 MeV observed by SAS-2},
  author = {Fichtel, C. E. and Kniffen, D. A. and Hartman, R. C.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730025046},
  note = {Source identifier: 19730025046}
}