@misc{indiciae6b5749750bd4,
  title = {Preliminary geologic map of the Black River quadrangle, east-central Alaska},
  author = {E. E. Brabb},
  year = {1970},
  doi = {10.3133/i601},
  url = {https://pubs.usgs.gov/publication/i601},
  note = {Source identifier: i601}
}