@misc{indiciaef13bb1148ef3,
  title = {Washing and coking tests of coal at the fuel-testing plant, Denver, Colorado, July 1, 1907, to June 30, 1908},
  author = {A.W. Belden and George Richmond Delamater and J.W. Groves},
  year = {1909},
  doi = {10.3133/b368},
  url = {https://pubs.usgs.gov/publication/b368},
  note = {Source identifier: b368}
}