@misc{indiciae8f5208cfe207,
  title = {Inventory of published and unpublished chemical analyses of surface waters in the continental United States and Puerto Rico, 1961},
  author = {Thomas H. Woodard and Sumner Griggs Heidel},
  year = {1964},
  doi = {10.3133/wsp1786},
  url = {https://pubs.usgs.gov/publication/wsp1786},
  note = {Source identifier: wsp1786}
}