@misc{indiciae641d225f5dc4,
  title = {Bibliography of publications containing major, minor, and trace element data from the National Coal Resources Data System},
  author = {A.C. Finkelman and C.J. Wong and A.C. Cheng and R. B. Finkelman},
  year = {1991},
  doi = {10.3133/ofr91123},
  url = {https://pubs.usgs.gov/publication/ofr91123},
  note = {Source identifier: ofr91123}
}