@misc{indiciae28617aae2c45,
  title = {Radium-226 contents and Rn emanation coefficients of particle-size fractions of alkaline, acid and mixed U mill tailings},
  author = {E. R. Landa},
  year = {1987},
  url = {https://pubs.usgs.gov/publication/70015254},
  note = {Source identifier: 70015254}
}