@misc{indiciae3ecd38040985,
  title = {Field guide for collecting samples for analysis of volatile organic compounds in stream water for the National Water-Quality Assessment Program},
  author = {Larry R. Shelton},
  year = {1997},
  doi = {10.3133/ofr97401},
  url = {https://pubs.usgs.gov/publication/ofr97401},
  note = {Source identifier: ofr97401}
}