@misc{indiciaecb7df05046b3,
  title = {Quality of surface waters of the United States, 1941},
  author = {W. D. Collins and C. S. Howard and S. K. Love},
  year = {1943},
  doi = {10.3133/wsp942},
  url = {https://pubs.usgs.gov/publication/wsp942},
  note = {Source identifier: wsp942}
}