@misc{indiciaeb431fc51743e,
  title = {Factors influencing permeability and diffusion of radon in synthetic sandstones},
  author = {Hilton Bernard Evans},
  year = {1964},
  doi = {10.3133/ofr6451},
  url = {https://pubs.usgs.gov/publication/ofr6451},
  note = {Source identifier: ofr6451}
}