@misc{indiciaec992a30314ef,
  title = {The half life of Th232 and the branching ratio of Bi212},
  author = {F. E. Senftle and T. A. Farley and Norman Henry Lazar},
  year = {1956},
  doi = {10.3133/tei193},
  url = {https://pubs.usgs.gov/publication/tei193},
  note = {Source identifier: tei193}
}