@misc{indiciae0b876acd2d62,
  title = {Gross-beta activity in ground water: natural sources and artifacts of sampling and laboratory analysis},
  author = {Alan H. Welch and Zoltan Szabo and David L. Parkhurst and Peter C. Van Metre and Ann H. Mullin},
  year = {1995},
  doi = {10.1016/0883-2927(95)00020-8},
  url = {https://pubs.usgs.gov/publication/70185382},
  note = {Source identifier: 70185382}
}