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- National Park Service, Press release, Wawona Road Reconstruction, September 1930.
- Thomson, Superintendent's Monthly Report, April 1933, 9; Superintendent's Monthly Report, October 1933, 10.
- Enid Michael, "Roadside Planting of the New Wawona Highway," Yosemite Nature Notes, Vol. XII No. 12, December 1937; "General Landscape Plan for Wawona," 1925, Yosemite National Park Maintenance and Engineering Office; Thomson, Superintendent's Monthly Report, November 1932, 7. Parts of the old road grade are still visible in places, particularly in the area north of Chinquapin where 1990 fires opened up the vegetation.
- Runte, illustration 27; Wawona Tunnel National Register nomination, Sec. 8, p.4.
- Quoted in Johnston, 46.
- Wawona Tunnel National Register nomination, Sec. 7, p. 1; Linda Wedel Greene, II:784. The old road was opened again in 1990 for fire control purposes, and is being opened to maintenance vehicles again 1992 for the removal of the phone cable to Wawona, despite the fact that the route traverses through designated wilderness.
- Project Completion Report 161, Armor Coat Paving, Mariposa Grove Road, September 1934. Yosemite National Park Maintenance and Engineering Office.
- Completion Report 159, Minor Road Improvements and Oiling, 1934. Yosemite National Park Maintenance and Engineering Office; Thomson, Superintendent's Monthly Report, May 1935, 7; Superintendent's Monthly Report, July 1935, 6.
- Greene, II:860.
- Harlan D. Unrau, Historical Overview and Assessment of Significance of Stone Walls and Rock Work Along Glacier Point Road in Yosemite National Park (Denver, CO: National Park Service, Denver Service Center, January 1990), 34.
- 1950 Flood Damage Repair and Reconstruction Estimates. Copy at Yosemite Park Maintenance and Engineering Office.
- Project Completion Report #374, Resurfacing of Glacier Point and Wawona Roads, November 1960. Yosemite National Park Maintenance and Engineering office.
- U.S. Department of Transportation, Federal Highway Administration. Yosemite National Park, Road System Evaluation, Parkwide Road Evaluation Study, 1989, 87, 99, 117.
