@misc{indiciaee56a923dd1b7,
  title = {SCRNDIGW; a Windows screen digitizing program (an image quantitating tool)},
  author = {Philip S. Powers},
  year = {1994},
  doi = {10.3133/ofr94697b},
  url = {https://pubs.usgs.gov/publication/ofr94697B},
  note = {Source identifier: ofr94697B}
}