Aleshire, Peter. "Dominguez-Escalante". Fredonia-Vermillion Cliffs Scenic Road – Words from the Road. Arizona Scenic Roads. Archived from the original on 2012-10-12. Retrieved 2013-01-04.
asu.edu
grandcanyonhistory.clas.asu.edu
"Lees Ferry". Nature, Culture and History at the Grand Canyon. Arizona State University. Archived from the original on 2012-06-14. Retrieved 2013-01-04.
enpub.fulton.asu.edu
Rowland, Scott. "Navajo Bridge Project". Fulton School of Engineering. Arizona State University. Archived from the original on 2012-02-08. Retrieved 2013-01-04.
"Chinle Formation". Canyonlands National Park. U.S. National Park Service. Retrieved 2013-01-04.
"Moenkopi Formation". Canyonlands National Park. U.S. National Park Service. Retrieved 2013-01-04.
"Paria Canyon Permit Area – Geology". Vermilion Cliffs National Monument: Paria Canyon/Vermilion Cliffs Wilderness. U.S. Bureau of Land Management. Retrieved 2013-01-04.
Aleshire, Peter. "Dominguez-Escalante". Fredonia-Vermillion Cliffs Scenic Road – Words from the Road. Arizona Scenic Roads. Archived from the original on 2012-10-12. Retrieved 2013-01-04.
"Lees Ferry". Nature, Culture and History at the Grand Canyon. Arizona State University. Archived from the original on 2012-06-14. Retrieved 2013-01-04.
Rowland, Scott. "Navajo Bridge Project". Fulton School of Engineering. Arizona State University. Archived from the original on 2012-02-08. Retrieved 2013-01-04.
Rogers, Jedediah (2006). "Glen Canyon Unit"(PDF). U.S. Bureau of Reclamation. Archived from the original(PDF) on 2015-09-10. Retrieved 2013-01-04.