@misc{indiciae039f3b9f2f7c,
  title = {Internal and external scope in willingness-to-pay estimates for threatened and endangered wildlife},
  author = {K.L. Giraud and J.B. Loomis and R.L. Johnson},
  year = {1999},
  doi = {10.1006/jema.1999.0277},
  url = {https://pubs.usgs.gov/publication/70021431},
  note = {Source identifier: 70021431}
}