@misc{indiciae104e1ed963a8,
  title = {Comprehensive study of Leon-Queretaro area},
  author = {Espinosa, H. A. and Moreno, H. R. and Martell, J. H. O.},
  year = {1976},
  url = {https://ntrs.nasa.gov/citations/19770010598},
  note = {Source identifier: 19770010598}
}