@misc{indiciae56a063952997,
  title = {Geology of certain lignite fields in eastern Montana. The Baker lignite field, Custer County, Montana. The Terry lignite field, Custer County, Montana. The Glendive lignite field, Dawson County, Montana. The Sidney lignite field, Dawson County, Montana. The Culbertson lignite field, Valley County, Montana},
  author = {W. R. Calvert and C. F. Bowen and Frank A. Herald and J. H. Hance and Eugene Stebinger and A. L. Beekly},
  year = {1912},
  doi = {10.3133/b471d},
  url = {https://pubs.usgs.gov/publication/b471D},
  note = {Source identifier: b471D}
}