@misc{indiciaed76b76aa6a6d,
  title = {Radioactivity in the galactic plane},
  author = {Walraven, G. D. and Haymes, R. C.},
  year = {1976},
  url = {https://ntrs.nasa.gov/citations/19770029143},
  note = {Source identifier: 19770029143}
}