N-reactor at Hanford Reservation, Washington : safety and environmental concerns : oversight hearings before the Subcommittee on General Oversight, Northwest Power, and Forest Management of the Committee on Interior and Insular Affairs, House of Representatives, Ninety-ninth Congress, second session, on N-reactor at Hanford Reservation, Washington, safety and environmental concerns: hearing held May 19, 1986, Portland, OR ; June 16, 1986, Washington, DC. (U.S. G.P.O. :, 1987)