@misc{indiciaea5c38a9aa78f,
  title = {Field surveying and topographic mapping in Alaska: 1947-83},
  author = {Robert C. Foley},
  year = {1987},
  doi = {10.3133/cir991},
  url = {https://pubs.usgs.gov/publication/cir991},
  note = {Source identifier: cir991}
}