@misc{indiciaee49caf537668,
  title = {Approximate ground-water-level contours, April 1981, for the Soquel-Aptos area, Santa Cruz County, California},
  author = {Richard M. Bloyd},
  year = {1981},
  doi = {10.3133/ofr81680},
  url = {https://pubs.usgs.gov/publication/ofr81680},
  note = {Source identifier: ofr81680}
}