@misc{indiciaef6590906d2ab,
  title = {Digital topographic map centered on the Idaho Batholith and Challis volcanic field, northwestern United States},
  author = {J. W. Cady},
  year = {1992},
  doi = {10.3133/gp996},
  url = {https://pubs.usgs.gov/publication/gp996},
  note = {Source identifier: gp996}
}