O'Neill unit, Nebraska, Missouri River Basin project. Letter from the Assistant Secretary of the Interior transmitting a report on the O'Neill unit, Missouri River Basin project, Nebraska, pursuant to the provisions of section 9(a) of the Reclamation Project Act of 1939 (53 stat. 1187). September 4, 1968. -- Referred to the Committee on Interior and Insular Affairs and ordered to be printed with illustrations