@misc{indiciaee9f4e55f1129,
  title = {Quality-assurance plan for the analysis of fluvial sediment by laboratories of the U.S. Geological Survey},
  author = {Wilbur J. Matthes and Clyde J. Sholar and John R. George},
  year = {1992},
  doi = {10.3133/ofr91467},
  url = {https://pubs.usgs.gov/publication/ofr91467},
  note = {Source identifier: ofr91467}
}