@misc{indiciae591b9f42a5d9,
  title = {Stratigraphy of the Cretaceous rocks and the Tertiary Ojo Alamo Sandstone, Navajo and Hopi Indian Reservations, Arizona, New Mexico, and Utah},
  author = {R. B. O'Sullivan and C.A. Repenning and E. C. Beaumont and H. G. Page},
  year = {1972},
  doi = {10.3133/pp521e},
  url = {https://pubs.usgs.gov/publication/pp521E},
  note = {Source identifier: pp521E}
}