Banks lake and Potholes reservoir recreation : hearing before the Subcommittee on Irrigation and Reclamation of the Committee on Interior and Insular Affairs, United States Senate, Eighty-eighth Congress, second session, on S. 2493, a bill to authorize the Secretary of the Interior to determine that certain costs of operating and maintaining Banks lake and Potholes reservoir on the Columbia basin project for recreational purposes are nonreimbursable, March 3, 1964. (U.S. G.P.O.,, 1964)