First Tentative Outline for "Today" Show, Thursday July 21, 1966. Lawrence Mehren, Chairman and President, Central Arizona Project Association, 1966?
Arizona's Water Problems: An Address by Lawrence Mehren Before the Water & Power Agricultural Committee, Los Angeles Chamber of Commerce, January 10, 1964.
News Release of the Office of the Secretary, Department of the Interior: Secretary Udall announces study for regional solution of water and power problems of Pacific Southwest, January 22, 1963.
Stewart Udall to Carl T. Hayden re: California Support for a Regional Water Plan, July 22, 1963.
Stewart Udall to Carl T. Hayden re: Justification of Southwest Regional Water Plan, June 12,1963.
Stewart Udall to Carl T. Hayden, February 12, 1964 re: Roy Elson and water issues.