@misc{indiciae1d2e289d0d82,
  title = {Radon-222 and its parent radionuclides in groundwater from two study areas in New Jersey and Maryland, U.S.A.},
  author = {R. B. Wanty and S. L. Johnson and Paul H. Briggs},
  year = {1991},
  doi = {10.1016/0883-2927(91)90007-c},
  url = {https://pubs.usgs.gov/publication/70016357},
  note = {Source identifier: 70016357}
}