@misc{indiciaec82242ee8cf1,
  title = {The Little Powder River coal field, Campbell County, Wyoming. The Sussex coal field, Johnson, Natrona, and Converse Counties, Wyoming. The Lost Spring coal field, Converse County, Wyoming},
  author = {J.A. Davis and Carroll H. Wegemann and Dean E. Winchester},
  year = {1912},
  doi = {10.3133/b471f},
  url = {https://pubs.usgs.gov/publication/b471F},
  note = {Source identifier: b471F}
}