@misc{indiciae94cd7a20a29e,
  title = {Four preliminary gravity maps of parts of Alaska},
  author = {D.F. Barnes},
  year = {1967},
  doi = {10.3133/ofr6710},
  url = {https://pubs.usgs.gov/publication/ofr6710},
  note = {Source identifier: ofr6710}
}