@misc{indiciae88eee5a48817,
  title = {SCRNDIGW; a Windows screen digitizing program (an image quantitating tool)},
  author = {Philip S. Powers},
  year = {1994},
  doi = {10.3133/ofr94697a},
  url = {https://pubs.usgs.gov/publication/ofr94697A},
  note = {Source identifier: ofr94697A}
}