@misc{indiciaecf3487835127,
  title = {Assessment of undiscovered conventionally recoverable petroleum resources of the Northwest European assessment region},
  author = {H.D. Klemme and C.D. Masters},
  year = {1984},
  doi = {10.3133/ofr8494},
  url = {https://pubs.usgs.gov/publication/ofr8494},
  note = {Source identifier: ofr8494}
}