@misc{indiciae150899dadcba,
  title = {Occurrence of dissolved organic carbon in selected ground-water samples in the United States},
  author = {J. A. Leenheer and Ronald L. Malcolm and P. W. McKinley and Lawrence A. Eccles},
  year = {1974},
  url = {https://pubs.usgs.gov/publication/70232452},
  note = {Source identifier: 70232452}
}