@misc{indiciae841d2bf2508a,
  title = {Geologic assessment of undiscovered, technically recoverable coalbed-gas resources in Cretaceous and Tertiary rocks, North Slope, and adjacent state waters, Alaska},
  author = {Stephen B. Roberts},
  year = {2008},
  doi = {10.3133/ds69s},
  url = {https://pubs.usgs.gov/publication/ds69S},
  note = {Source identifier: ds69S}
}