@misc{indiciae87c2e026b623,
  title = {Origin of the siliceous Mowry shale of the Black Hills region},
  author = {W.W. Rubey},
  year = {1929},
  doi = {10.3133/pp154d},
  url = {https://pubs.usgs.gov/publication/pp154D},
  note = {Source identifier: pp154D}
}