Columbia Power Administration, joint hearings before subcommittees of Committee on Commerce, Senate, and Committee on Rivers and Harbors, House of Representatives, 77th Congress, 2d session, on S. 2430, H. R. 6889, H. R. 6890, bills to amend Bonneville act to authorize acquisition of utility systems and to coordinate operation of the Government's power facilities on Columbia River, June 3-19, 1942.