@misc{indiciaef093cc546f79,
  title = {The investigation of chemical structure of coal macerals via transmitted-light FT-IR microscopy by X. Sun},
  author = {J.C. Hower and I. Suarez-Ruiz and Maria Mastalerz and A.C. Cook},
  year = {2007},
  doi = {10.1016/j.saa.2006.11.034},
  url = {https://pubs.usgs.gov/publication/70030998},
  note = {Source identifier: 70030998}
}