@misc{indiciaecbe20ae4b419,
  title = {Aeromagnetic maps of Granite Fiords Wilderness study area, Ketchikan and Bradfield Canal quadrangles, southeastern Alaska},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1976},
  doi = {10.3133/ofr76558},
  url = {https://pubs.usgs.gov/publication/ofr76558},
  note = {Source identifier: ofr76558}
}