@misc{indiciaebd53600e2df1,
  title = {Determination of readily soluble copper, zinc, and lead in soils and rocks; nitric acid extraction},
  author = {Harold Bloom and H.E. Crowe},
  year = {1954},
  doi = {10.3133/ofr53287},
  url = {https://pubs.usgs.gov/publication/ofr53287},
  note = {Source identifier: ofr53287}
}