@misc{indiciaedb4e343a85dc,
  title = {Testing and application of diffusion samplers to identify temporal trends in volatile-organic compounds},
  author = {Philip T. Harte and M.J. Brayton and Wayne Ives and Sharon Perkins and Carroll Brown and Richard E. Willey},
  year = {2001},
  doi = {10.3133/ofr00196},
  url = {https://pubs.usgs.gov/publication/ofr00196},
  note = {Source identifier: ofr00196}
}