@misc{indiciaeed52332546d2,
  title = {Current oil and gas production from North American Upper Cretaceous chalks},
  author = {Peter A. Scholle},
  year = {1977},
  doi = {10.3133/cir767},
  url = {https://pubs.usgs.gov/publication/cir767},
  note = {Source identifier: cir767}
}