@misc{indiciae3461ed5b5b67,
  title = {History and progress of the North American Soil Geochemical Landscapes Project, 2001-2010},
  author = {David B. Smith and William F. Cannon and Laurel G. Woodruff and Francisco Moreira Rivera and Andrew N. Rencz and Robert G. Garrett},
  year = {2012},
  url = {https://pubs.usgs.gov/publication/70044961},
  note = {Source identifier: 70044961}
}