@misc{indiciaeebc2e3038327,
  title = {Aeromagnetic map of the Long Beach-Santa Ana area, Los Angeles and Orange Counties, California},
  author = {G. E. Andreasen and J. A. Pitkin and F.A. Petrafeso},
  year = {1964},
  doi = {10.3133/gp464},
  url = {https://pubs.usgs.gov/publication/gp464},
  note = {Source identifier: gp464}
}