@misc{indiciaec452afca3f11,
  title = {Tritium deposition in the continental United States, 1953-83},
  author = {R. L. Michel},
  year = {1989},
  doi = {10.3133/wri894072},
  url = {https://pubs.usgs.gov/publication/wri894072},
  note = {Source identifier: wri894072}
}