@misc{indiciaeb07e96e47b24,
  title = {U. S. Geological Survey programs in water quality - looking toward the 1990's},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1988},
  doi = {10.3133/ofr8972},
  url = {https://pubs.usgs.gov/publication/ofr8972},
  note = {Source identifier: ofr8972}
}