@misc{indiciae04d63f6c9f56,
  title = {Geochemical evaluation of coal from the Tertiary Usibelli Group, Usibelli mine, Alaska, one of the lowest sulfur coals mined in the United States},
  author = {Ronald H. Affolter and Gary D. Stricker and Richard G. Stanley},
  year = {1995},
  url = {https://pubs.usgs.gov/publication/70198726},
  note = {Source identifier: 70198726}
}