@misc{indiciae54494b62dc3a,
  title = {Increased concentrations of potassium in heartwood of trees in response to groundwater contamination},
  author = {D.A. Vroblesky and T.M. Yanosky and F.R. Siegel},
  year = {1992},
  doi = {10.1007/bf01797434},
  url = {https://pubs.usgs.gov/publication/70017197},
  note = {Source identifier: 70017197}
}