@misc{indiciaeddf2d762d630,
  title = {Geology of quadrangles H-12, H-13, and parts of I-12 and I-13, (zone III) in northeastern Santander Department, Colombia},
  author = {Dwight Edward Ward and Richard Goldsmith and Jaime B. Cruz and Hernan A. Restrepo},
  year = {1974},
  doi = {10.3133/ofr74258},
  url = {https://pubs.usgs.gov/publication/ofr74258},
  note = {Source identifier: ofr74258}
}