Participating researchers gathered information from a variety of sources for this work. Constance McLaughlin Green, Harry C. Thomson and Peter C. Roots, The Ordnance Department Planning Munitions for War (Washington, D.C., 1955) and Harry C. Thomson and Lida Mayo, The Ordnance Department: Procurement and Supply (Washington, D.C., 1960), two volumes in the series United States Army in World War II, provided the historical background of the Ordnance Department. The War Department Completion Reports for the Black Hills Ordnance Depot contained a full description of the construction process. Documents held by the Real Estate Audit Office, Omaha District Corps of Engineers, yielded data concerning the acquisition of land, as well as the closure of the depot and property disposal. Three depositories of Congressional papers contain correspondence and official reports which shed light on the negotiations involved in instituting and maintaining the depot, details of relations between the depot and surrounding communities, and the closing of the facility: E. Y. Berry Archives, Leland Case Library of Western Historical Studies, Black Hills State College, Spearfish, South Dakota; Francis Case Archives, Layne Library, Dakota Wesleyan University, Mitchell, South Dakota; and Karl Mundt Archives, Karl E. Mundt Library, Dakota State College, Madison, South Dakota.

Area newspapers, including the Hot Springs Star, the Edgemont HeraldTribune, the Custer Chronicle, and the Rapid City Journal provided a great deal of information on the unofficial activities at the depot. Specific depot publications, Black Hills Weekly (published by the Hot Springs Star), Igloo Magazine, The Walrus, The BHODian, and Provo High School's annual, the Rattler, contain additional details on social life, living conditions, and institutions.

Many people contributed written memoirs of their years at Igloo, provided information in letters, or were interviewed by researchers. Particularly helpful were contributions by Dave Bauer, Fred Coates, Louisa DeLeon, Cordelia W. Erickson, Joyce Frary, Laura Hendrix, Wilma E. Hurley, Dorothy Stearns Honadel, John and Matilda Johnle, William Knodel, Joe and Claudia Marsh, Eva J. Nichols, Lanoir R. Pederson, Donna Harbaugh Parks, Dr. D. W Sewright, and Marjorie Tubbs. The transcript of a radio program conducted by Marjorie Hardman Tubbs and Helen Kolkman in 1946 provided an interesting picture of fife on the depot at that time.

Additional pertinent documents were provided by Carol Goddard, Wayne Jackson, John O'Neil, and Marshall Truax. A field report, "Opportunities for Economic Development in the Edgemont Area of South Dakota," (published by the U.S. Department of Commerce in 1964), and J. E. Lynch, Local Economic Development After Military Base Closures (New York, 1971), which includes a chapter on Edgemont's situation, were particularly helpful in assessing the impact of the depot's closing. The Business Research Bureau at the University of South Dakota, Vermillion, provided retail sales tax tables which illustrated business revenue fluctuations in Fall River County.