@misc{indiciae51eb1899671f,
  title = {A national-scale geochemical and mineralogical survey of soils of the conterminous United States},
  author = {David B. Smith and William F. Cannon and Laurel G. Woodruff},
  year = {2011},
  doi = {10.1016/j.apgeochem.2011.03.116},
  url = {https://pubs.usgs.gov/publication/70227299},
  note = {Source identifier: 70227299}
}