@misc{indiciae9096b324a11d,
  title = {AP-8 trapped proton environment for solar maximum and solar minimum},
  author = {Sawyer, D. M. and Vette, J. I.},
  year = {1976},
  url = {https://ntrs.nasa.gov/citations/19770012039},
  note = {Source identifier: 19770012039}
}