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Joseph Simons to Carl T. Hayden re: Imperial Valley farmers support for Boulder Canyon Project, May 25, 1926.
Carl T. Hayden to George W. P. Hunt re: Swing-Johnson Bill and three state meeting in Los Angeles, December 11, 1926.
Petition of residents of Graham County, Arizona opposed to the "Swing-Johnson Boulder Canyon Dam Bill," 1/14/1927.
Why I oppose the approval of the Colorado River Compact, by Geo. W.P. Hunt, Governor of Arizona, 1923?
Report of Colorado River Board on the Boulder Canyon Project to the Secretary of the Interior, 11/24/1928.
Interior photograph of Barrel Vault at Cosanti in Paradise Valley, Arizona showing plaster and cloth form work
Photograph showing south exterior view of Barrel Vault at Cosanti in Paradise Valley, Arizona
Photograph showing exterior view of Barrel Vault and Pumpkin Apse at Cosanti in Paradise Valley, Arizona
Interior photograph of Barrel Vault under construction at Cosanti, Paradise Valley, Arizona
Interior photograph of Barrel Vault at Cosanti in Paradise Valley, Arizona showing plaster and cloth form work