@misc{indiciaefe07de3ac1d2,
  title = {Mining in Alaska in 1939},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1940},
  doi = {10.3133/ofr4013},
  url = {https://pubs.usgs.gov/publication/ofr4013},
  note = {Source identifier: ofr4013}
}