@misc{indiciae80f9551136b4,
  title = {Mineral resources of Alaska, report on progress of investigations in 1920--Preface},
  author = {A. H. Brooks},
  year = {1922},
  doi = {10.3133/b722a},
  url = {https://pubs.usgs.gov/publication/b722A},
  note = {Source identifier: b722A}
}