@misc{indiciae1bac14fbbce1,
  title = {Application of automated image analysis to coal petrography},
  author = {E. C. T. Chao and J.A. Minkin and C.L. Thompson},
  year = {1982},
  doi = {10.1016/0166-5162(82)90002-7},
  url = {https://pubs.usgs.gov/publication/70011536},
  note = {Source identifier: 70011536}
}