Williams, Gary W., DeeVon Bailey, Oral Capps, Jr., Linda A. Detwiler, Hudson A. Glimp, Timothy Hammonds, Douglas D. Hedley, Helen H. Jensen, Paul S. Kuber, and David L. Thomas. Changes in the Sheep Industry in the United States: Making the Transition from Tradition. Committee on the Economic Development and Current Status of the Sheep Industry in the United States, Board on Agricultural and Natural Resources, Division on Earth and Life Studies, National Research Council of the National Academies. National Academies Press: Washington, DC. 2008.