@misc{indiciae3bfe258de98c,
  title = {Map of hillside materials and description of their engineering character, San Mateo County, California},
  author = {C. M. Wentworth and Stephen Ellen and V. A. Frizzell and Juluis Schlocker},
  year = {1985},
  doi = {10.3133/i1257d},
  url = {https://pubs.usgs.gov/publication/i1257D},
  note = {Source identifier: i1257D}
}