@misc{indiciaef99c47f9b53c,
  title = {Results of intercomparison studies for the measurement of pH and specific conductance at National Atmospheric Deposition Program/National Trends Network monitoring sites, October 1981-October 1985},
  author = {L.J. Schroder and M. H. Brooks and T. C. Willoughby},
  year = {1987},
  doi = {10.3133/wri864363},
  url = {https://pubs.usgs.gov/publication/wri864363},
  note = {Source identifier: wri864363}
}