@misc{indiciae5bf8de27293c,
  title = {The origin and distribution of HAPs elements in relation to maceral composition of the A1 lignite bed (Paleocene, Calvert Bluff Formation, Wilcox Group), Calvert mine area, east-central Texas},
  author = {Sharon S. Crowley and Peter D. Warwick and Leslie F. Ruppert and James Pontolillo},
  year = {1997},
  doi = {10.1016/s0166-5162(97)00029-3},
  url = {https://pubs.usgs.gov/publication/70019404},
  note = {Source identifier: 70019404}
}