@misc{indiciae6662d6d0c4b2,
  title = {Geology and oil resources of the Summerland district, Santa Barbara County, California},
  author = {Ralph Arnold},
  year = {1907},
  doi = {10.3133/b321},
  url = {https://pubs.usgs.gov/publication/b321},
  note = {Source identifier: b321}
}