@misc{indiciaea5b49769ea75,
  title = {Siderite concretions: indicators of early diagenesis in the Gammon shale (Cretaceous).},
  author = {D. L. Gautier},
  year = {1982},
  url = {https://pubs.usgs.gov/publication/70011694},
  note = {Source identifier: 70011694}
}