National Research Council (U. S.) Study Committee on the Potential for Rehabilitating Lands Surface Mined for Coal in the Western United States (1974). Rehabilitation potential of western coal lands. Cambridge, MA: Ford Foundation Energy Policy Project / Ballinger Pub. Co. pp. 85–86. ISBN978-0-88410-331-8.
"Lamm explained his view that Colorado must begin to control its own future, rather than succumbing to Washington's plea that the state should be "a national sacrifice area" to provide for the nation's energy needs." Griffith, Winthrop (1974-10-27). "An eco-freak for governor?". The New York Times. ISSN0362-4331. Retrieved 2017-05-10.
Huntington Smith, Helena (1975-02-16). "The Wringing of the West". The Washington Post. Washington, DC. p. 1–B4. ISSN0190-8286. ProQuest146405625.
"Lamm explained his view that Colorado must begin to control its own future, rather than succumbing to Washington's plea that the state should be "a national sacrifice area" to provide for the nation's energy needs." Griffith, Winthrop (1974-10-27). "An eco-freak for governor?". The New York Times. ISSN0362-4331. Retrieved 2017-05-10.