@misc{indiciae0fc20629e90e,
  title = {MICROCHARACTERIZATION OF ARSENIC- AND SELENIUM-BEARING PYRITE IN UPPER FREEPORT COAL, INDIANA COUNTY, PENNSYLVANIA.},
  author = {J.A. Minkin and R. B. Finkelman and C.L. Thompson and E. C. T. Chao and L.F. Ruppert and H. Blank and C. B. Cecil},
  year = {1984},
  url = {https://pubs.usgs.gov/publication/70013406},
  note = {Source identifier: 70013406}
}