@misc{indiciae3bb6014f7745,
  title = {SUBMICROSCOPIC ( less than 1 mu m) MINERAL CONTENTS OF VITRINITES IN SELECTED BITUMINOUS COAL BEDS.},
  author = {J.A. Minkin and E. C. T. Chao and C.L. Thompson and M.-V. Wandless and F.T. Dulong and R.R. Larson and S.G. Neuzil},
  year = {1983},
  url = {https://pubs.usgs.gov/publication/70012025},
  note = {Source identifier: 70012025}
}