@misc{indiciae064484deda19,
  title = {The purchase of coal by the Government under specifications, with analyses of coal delivered for the fiscal year 1908-9},
  author = {George S. Pope},
  year = {1910},
  doi = {10.3133/b428},
  url = {https://pubs.usgs.gov/publication/b428},
  note = {Source identifier: b428}
}