@misc{indiciae639618428c0f,
  title = {World conventional crude oil and natural gas: Identified reserves, undiscovered resources and futures},
  author = {C.D. Masters and D. H. Root and R. M. Turner},
  year = {1998},
  doi = {10.3133/ofr98468},
  url = {https://pubs.usgs.gov/publication/ofr98468},
  note = {Source identifier: ofr98468}
}