Des Moines River at Ottumwa, Iowa : letter from the Secretary of the Army transmitting a letter from the Chief of Engineers, Department of the Army, dated December 7, 1970, submitting a report ... on Des Moines River at Ottumwa, Iowa, requested by a resolution of the Committee on Public Works, House of Representatives, adopted October 5, 1966. (U.S. Government Printing Office, 1972)