@misc{indiciaebd7bffe92b2a,
  title = {Field method for the determination of zinc in soils},
  author = {Rollin Elbert Stevens and Hy Almond},
  year = {1949},
  doi = {10.2113/gsecongeo.44.4.296},
  url = {https://pubs.usgs.gov/publication/70215460},
  note = {Source identifier: 70215460}
}