@misc{indiciaed89f99c6cb04,
  title = {Interpretation of an aeromagnetic anomaly in McMullen and Live Oak counties, Texas},
  author = {Joseph S. Duval and R.A. Martin},
  year = {1977},
  doi = {10.3133/ofr77768},
  url = {https://pubs.usgs.gov/publication/ofr77768},
  note = {Source identifier: ofr77768}
}