@misc{indiciaea08ffb6f7fd9,
  title = {Assessment of undiscovered hydrocarbon resources of sub-Saharan Africa},
  author = {Michael E. Brownfield},
  year = {2016},
  doi = {10.3133/ds69gg},
  url = {https://pubs.usgs.gov/publication/ds69GG},
  note = {Source identifier: ds69GG}
}