@misc{indiciaeb8115a486789,
  title = {Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Preparation procedure for aquatic biological material determined for trace metals},
  author = {Gerald L. Hoffman},
  year = {1996},
  doi = {10.3133/ofr96362},
  url = {https://pubs.usgs.gov/publication/ofr96362},
  note = {Source identifier: ofr96362}
}