@misc{indiciaed004a90ef57b,
  title = {Computer technique for slope-area measurements},
  author = {W.P. Somers and G.I. Selner},
  year = {1965},
  doi = {10.3133/70045413},
  url = {https://pubs.usgs.gov/publication/70045413},
  note = {Source identifier: 70045413}
}