@misc{indiciaefc445900eb70,
  title = {Quality-assurance results for field pH and specific-conductance measurements, and for laboratory analysis, National Atmospheric Deposition Program and National Trends Network; January 1980-September 1984},
  author = {L.J. Schroder and M. H. Brooks and B.A. Malo and T. C. Willoughby},
  year = {1986},
  doi = {10.3133/wri864139},
  url = {https://pubs.usgs.gov/publication/wri864139},
  note = {Source identifier: wri864139}
}