@misc{indiciae0413f1bb1354,
  title = {Distribution of Igneous Rocks in Medina and Uvalde Counties, Texas, as Inferred from Aeromagnetic Data},
  author = {David V. Smith and Robert R. McDougal and Bruce D. Smith and Charles D. Blome},
  year = {2008},
  doi = {10.3133/sir20075191},
  url = {https://pubs.usgs.gov/publication/sir20075191},
  note = {Source identifier: sir20075191}
}