@misc{indiciaefefcbf54afa3,
  title = {Aeromagnetic map of the Chinook quadrangle, Blaine County, Montana},
  author = {R. W. Johnson and E. R. King and D.R. Hawkins},
  year = {1963},
  doi = {10.3133/gp383},
  url = {https://pubs.usgs.gov/publication/gp383},
  note = {Source identifier: gp383}
}