@misc{indiciae715484680474,
  title = {The Cambrian-Ordovician rocks of Sonora, Mexico, and southern Arizona, southwestern margin of North America (Laurentia)},
  author = {William R. Page and Alta C. Harris and John E. Repetski},
  year = {2013},
  doi = {10.1306/13331520m983515},
  url = {https://pubs.usgs.gov/publication/70045425},
  note = {Source identifier: 70045425}
}