@misc{indiciae4e536002c8d1,
  title = {Assessment of undiscovered biogenic gas resources, North-central Montana Province},
  author = {Jennie L. Ridgley and Lawrence O. Anna and Steven M. Condon and Neil S. Fishman and Timothy C. Hester and Paul G. Lillis and Elisabeth L. Rowan and Ronald Charpentier and Troy A. Cook and Robert A. Crovelli and Timothy R. Klett and Christopher J. Schenk},
  year = {2008},
  doi = {10.3133/fs20083036},
  url = {https://pubs.usgs.gov/publication/fs20083036},
  note = {Source identifier: fs20083036}
}