@misc{indiciae60119b74aa13,
  title = {Aeromagnetic map of the Chain Lakes quadrangle, Franklin and Somerset Counties, Maine},
  author = {J. R. Henderson and F. P. Gilbert},
  year = {1963},
  doi = {10.3133/gp330},
  url = {https://pubs.usgs.gov/publication/gp330},
  note = {Source identifier: gp330}
}