@misc{indiciae160f75561eb1,
  title = {Pb-concentrations and Pb-isotope ratios in soils collected along an east-west transect across the United States},
  author = {Clemens Reimann and David B. Smith and Laurel G. Woodruff and Belinda Flem},
  year = {2011},
  doi = {10.1016/j.apgeochem.2011.04.018},
  url = {https://pubs.usgs.gov/publication/70005257},
  note = {Source identifier: 70005257}
}