@misc{indiciae0358337629bf,
  title = {Metallic mineral resources map of the Big Delta Quadrangle, Alaska},
  author = {Edward H. Cobb},
  year = {1972},
  doi = {10.3133/mf388},
  url = {https://pubs.usgs.gov/publication/mf388},
  note = {Source identifier: mf388}
}