@misc{indiciae83dc889506f7,
  title = {Double-mass curves, with a section fitting curves to cyclic data},
  author = {James K. Searcy and Clayton H. Hardison and Walter B. Langbein},
  year = {1960},
  doi = {10.3133/wsp1541b},
  url = {https://pubs.usgs.gov/publication/wsp1541B},
  note = {Source identifier: wsp1541B}
}