@misc{indiciaece9b8d1ecbb9,
  title = {Guidelines for collecting and processing samples of stream bed sediment for analysis of trace elements and organic contaminants for the National Water-Quality Assessment Program},
  author = {Larry R. Shelton and Paul D. Capel},
  year = {1994},
  doi = {10.3133/ofr94458},
  url = {https://pubs.usgs.gov/publication/ofr94458},
  note = {Source identifier: ofr94458}
}