@misc{indiciae907cdc140425,
  title = {CHEMICAL STRUCTURES IN COAL: GEOCHEMICAL EVIDENCE FOR THE PRESENCE OF MIXED STRUCTURAL COMPONENTS.},
  author = {Patrick G. Hatcher and Irving A. Breger and G.E. Maciel and N.M. Szeverenyi},
  year = {1983},
  url = {https://pubs.usgs.gov/publication/70011238},
  note = {Source identifier: 70011238}
}