@misc{indiciae092c45248cb5,
  title = {Preliminary surficial deposits map of National Petroleum Reserve - Alaska},
  author = {John R. Williams and W. E. Yeend and L. D. Carter and T. D. Hamilton},
  year = {1977},
  doi = {10.3133/ofr77868},
  url = {https://pubs.usgs.gov/publication/ofr77868},
  note = {Source identifier: ofr77868}
}