@misc{indiciae646a35d06038,
  title = {USGS Alaskan gravity data maps of Medfra and McGrath quadrangles},
  author = {D.F. Barnes},
  year = {1973},
  doi = {10.3133/ofr7316},
  url = {https://pubs.usgs.gov/publication/ofr7316},
  note = {Source identifier: ofr7316}
}