@misc{indiciae109f12b70283,
  title = {Solution of the gamma-ray transport equation for two media, the ground source and air, in airborne radioactivity surveying},
  author = {Arthur Yoshikazu Sakakura},
  year = {1964},
  doi = {10.3133/ofr64137},
  url = {https://pubs.usgs.gov/publication/ofr64137},
  note = {Source identifier: ofr64137}
}