@misc{indiciae99df40d88561,
  title = {Positron annihilation in solar flares},
  author = {Crannell, C. J. and Ramaty, R. and Werntz, C.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750020921},
  note = {Source identifier: 19750020921}
}