@misc{indiciae174184a78353,
  title = {The United Nations framework classification for fossil energy and mineral reserves and resources 2009},
  author = {Duncan MacDonald and M. Lynch-Bell and J. Ross and S. Heiberg and C. Griffiths and T. Klett},
  year = {2011},
  url = {https://pubs.usgs.gov/publication/70032646},
  note = {Source identifier: 70032646}
}