Bridges--Arizona--Grand Canyon; Rock formations; Rivers--Arizona; Canyons--Arizona;]]> Kolb, Emery Clifford, 1881-1976]]> Northern Arizona University. Cline Library.]]> Navajo Bridge (Ariz.); Colorado River (Colo.-Mexico); United States Highway 89]]> Northern Arizona University. Cline Library.]]> Bridges--Arizona--Grand Canyon; Rock formations; Rivers--Arizona; Canyons--Arizona;]]> Kolb, Emery Clifford, 1881-1976]]> Northern Arizona University. Cline Library.]]> Navajo Bridge (Ariz.); Colorado River (Colo.-Mexico);United States Highway 89]]> Northern Arizona University. Cline Library.]]> Bridges--Design and construction--Arizona--Grand Canyon]]> Kolb, Emery Clifford, 1881-1976]]> Northern Arizona University. Cline Library.]]> Navajo Bridge (Ariz.); United States Highway 89]]> 1920-1929; 20th century]]> Northern Arizona University. Cline Library.]]> Bridges--Arizona--Grand Canyon; Rock formations; Rivers--Arizona; Canyons--Arizona;]]> Kolb, Emery Clifford, 1881-1976]]> Northern Arizona University. Cline Library.]]> Navajo Bridge (Ariz.); Colorado River (Colo.-Mexico); United States Highway 89]]> Northern Arizona University. Cline Library.]]>