@misc{indiciae348948c58168,
  title = {Lower Tertiary stratigraphy of Mount Diablo, Marysville Buttes and west border of lower Central Valley of California},
  author = {Ralph Stewart},
  year = {1949},
  doi = {10.3133/oc34},
  url = {https://pubs.usgs.gov/publication/oc34},
  note = {Source identifier: oc34}
}