@misc{indiciae14f227b37de6,
  title = {Fischer assays of oil shale drill cores and rotary cuttings from the Piceance Basin, Colorado— 2009 update},
  author = {Tracey J. Mercier and Michael E. Brownfield and Ronald C. Johnson and Jesse G. Self},
  year = {1998},
  doi = {10.3133/ofr98483},
  url = {https://pubs.usgs.gov/publication/ofr98483},
  note = {Source identifier: ofr98483}
}