@misc{indiciae784a32c3ccc0,
  title = {Upper Proterozoic and Cambrian rocks in the Caborca region, Sonora, Mexico; physical stratigraphy, biostratigraphy, paleocurrent studies, and regional relations},
  author = {John H. Stewart and M.A.S. McMenamin and J. M. Morales-Ramirez},
  year = {1984},
  doi = {10.3133/pp1309},
  url = {https://pubs.usgs.gov/publication/pp1309},
  note = {Source identifier: pp1309}
}