@misc{indiciaeaa2fe370fbc9,
  title = {On the petrographic distinction of bituminite from solid bitumen in immature to early mature source rocks},
  author = {Paul C. Hackley and Brett J. Valentine and Javin J. Hatcherian},
  year = {2018},
  doi = {10.1016/j.coal.2018.06.004},
  url = {https://pubs.usgs.gov/publication/70219082},
  note = {Source identifier: 70219082}
}