@misc{indiciaef75c1370fec3,
  title = {Cretaceous shales from the western interior of North America: Sulfur/carbon ratios and sulfur-isotope composition},
  author = {D. L. Gautier},
  year = {1986},
  doi = {10.1130/0091-7613(1986)14<225:csftwi>2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70015071},
  note = {Source identifier: 70015071}
}