@misc{indiciaeee926e196074,
  title = {Conditional estimates and marginal probabilities for undiscovered recoverable oil and gas resources by province; statistical background data for U.S. Geological Survey Circular 860},
  author = {K. L. Varnes and Ronald R. Charpentier and G.L. Dolton},
  year = {1982},
  doi = {10.3133/ofr82666a},
  url = {https://pubs.usgs.gov/publication/ofr82666A},
  note = {Source identifier: ofr82666A}
}