@misc{indiciae181a5fe21d90,
  title = {A field method for the determination of tungsten in soils},
  author = {Frederick Norville Ward},
  year = {1951},
  doi = {10.3133/cir119},
  url = {https://pubs.usgs.gov/publication/cir119},
  note = {Source identifier: cir119}
}