@misc{indiciae5a4f39f3f3b6,
  title = {Metal absorption by Equisetum (horsetail)},
  author = {Helen L. Cannon and Hansford T. Shacklette and Harry Bastron},
  year = {1968},
  doi = {10.3133/b1278a},
  url = {https://pubs.usgs.gov/publication/b1278A},
  note = {Source identifier: b1278A}
}