@misc{indiciae0294b88e5752,
  title = {Geologic map of the North San Ysidro quadrangle, San Miguel County, New Mexico},
  author = {Ross B. Johnson},
  year = {1972},
  doi = {10.3133/gq1007},
  url = {https://pubs.usgs.gov/publication/gq1007},
  note = {Source identifier: gq1007}
}