@misc{indiciaec9819a67a57f,
  title = {Evaluation of the United States Geological Survey's Three-Step assessment methodology},
  author = {D.P. Harris and Michael Rieber},
  year = {1993},
  doi = {10.3133/ofr93258b},
  url = {https://pubs.usgs.gov/publication/ofr93258B},
  note = {Source identifier: ofr93258B}
}