@misc{indiciae586eaa1ecdf9,
  title = {Analytical results for stream sediment and soil samples from the Commonwealth of Puerto Rico, Isla de Culebra, and Isla de Vieques},
  author = {Sherman P. Marsh},
  year = {1992},
  doi = {10.3133/ofr92353a},
  url = {https://pubs.usgs.gov/publication/ofr92353A},
  note = {Source identifier: ofr92353A}
}