@misc{indiciae9d26c03e3e0a,
  title = {Natural gas: A perspective on resource availability},
  author = {Charles D. Masters},
  year = {1978},
  doi = {10.3133/ofr78188},
  url = {https://pubs.usgs.gov/publication/ofr78188},
  note = {Source identifier: ofr78188}
}