@misc{indiciaee2b9685b2c19,
  title = {Characterization of fly ash from low-sulfur and high-sulfur coal sources: Partitioning of carbon and trace elements with particle size},
  author = {James C. Hower and A.S. Trimble and Cortland F. Eble and Curtis A. Palmer and Allan Kolker},
  year = {1999},
  doi = {10.1080/00908319950014641},
  url = {https://pubs.usgs.gov/publication/70020925},
  note = {Source identifier: 70020925}
}