@misc{indiciaed658a31c1bb4,
  title = {Changes in optical properties, chemistry, and micropore and mesopore characteristics of bituminous coal at the contact with dikes in the Illinois Basin},
  author = {Maria Mastalerz and A. Drobniak and A. Schimmelmann},
  year = {2009},
  doi = {10.1016/j.coal.2008.05.014},
  url = {https://pubs.usgs.gov/publication/70033239},
  note = {Source identifier: 70033239}
}