@misc{indiciaed2a747605775,
  title = {Preliminary contour maps of gamma-ray spectrometric and aeromagnetic survey of the Freer area in Duval, Live Oak, McMullen, and Webb counties, Texas},
  author = {Karen A. Schulz},
  year = {1976},
  doi = {10.3133/ofr76525},
  url = {https://pubs.usgs.gov/publication/ofr76525},
  note = {Source identifier: ofr76525}
}