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Norris, Ralph, Ruling of County Superintendent of Objections to Formation of South Eastern Consolidated Independent School District, Polk County, Iowa, Nov. 10, 1953, Department of Public Instruction, State Archives, Iowa State Historical Department, Division of Historical Museum and Archives, Des Moines.
North Western Reporter, 2nd Series, Vol. 109 N.W. 2nd, West Publishing Co., St. Paul, Minn., 1961
Olin, Dr. Hubert L., Coal Mining in Iowa, The State of Iowa, Des Moines, 1965.
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Pierick, Joe, Town Council Papers, 1958-1959.
Pleasant Hill Planning and Zoning Commission Minutes, Beginning March 25, 1958.
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Pratt, LeRoy G., Polk County Coal Mines, Joint County School System of Polk and Story Counties and Polk Historical Society, 1974.
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Thompson, Robert W., One Hundred Years of Altoona History, 1868-1968, Altoona Centennial Association, Altoona, Iowa, 1968.
Treasurer’s Book, Pleasant Hill Independent School District, 1894-1934, courtesy of Vic Peterson.
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Warnock, J.G., “History of The Pleasant Hill Independent School District,” no date.
Witzenburg Anne B., editor, Town of Pleasant Hill, Iowa, photographs by Eike, Robert V., scrapbook, 1965.
Works Progress Administration, Iowa Graves Registration Survey, Polk County, Iowa, Vol I, Historical Department of Iowa, Des Moines.
Interviews: Marion & Alta Alexander, Jean Anderson, Harry L. Branscomb, Sally Bowen, Clifford Caldwell, Frederick “Chick” & Margery Chmura, Sonja Churchill, Richard Delk, Carl B. Feilman (Ipalco), Ruth Foster, Frank “Hank” Grant Jr., Ralph & Ruth Grant, Nancy Hartshorn, Richard & Betty Henry, Phil Hildebrand, Lawrence Hopper, C.P. & Gertrude Hurd, Melvin Kiner, Donald Kulisky, Dean Martens, Mark Miller, Kathy Nothdorf, Victor & Daisy Peterson, Milton Price, Pat Rehder, Llewellyn E. Slade, Erma Stallings, Frank Stark, Don C. Swanson, and Murry Witzenburg.