@misc{indiciaeb41699257ff8,
  title = {The present status of the producer-gas power plant in the United States. Condition of the coal-briquetting industry in the United States. The importance of uniform and systematic coal-mine sampling},
  author = {R.H. Fernald and Edward Wheeler Parker and John Shober Burrows},
  year = {1907},
  doi = {10.3133/b316g},
  url = {https://pubs.usgs.gov/publication/b316G},
  note = {Source identifier: b316G}
}