@misc{indiciaeb71c7a9bfbf0,
  title = {Geology and undiscovered oil and gas resources in the Madison Group, Williston Basin, North Dakota and Montana},
  author = {Stephanie B. Gaswirth and Paul G. Lillis and Richard M. Pollastro and Lawrence O. Anna},
  year = {2010},
  url = {https://pubs.usgs.gov/publication/70044634},
  note = {Source identifier: 70044634}
}