@misc{indiciae6c4769ac8a98,
  title = {Quality of surface waters of the United States, 1966, Parts 7 and 8, lower Mississippi River basin and western Gulf of Mexico basins},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1971},
  doi = {10.3133/wsp1994},
  url = {https://pubs.usgs.gov/publication/wsp1994},
  note = {Source identifier: wsp1994}
}