@misc{indiciae5bbb5ed98d5b,
  title = {Abundances of polycyclic aromatic hydrocarbons (PAHs) in 14 chinese and american coals and their relation to coal rank and weathering},
  author = {R. Wang and Gaisheng Liu and Jiahua Zhang and C. L. Chou and J. Liu},
  year = {2010},
  doi = {10.1021/ef1010622},
  url = {https://pubs.usgs.gov/publication/70037517},
  note = {Source identifier: 70037517}
}