Regulation of D.C. Transit System, Inc. : hearings before a subcommittee of the Committee on Interstate and Foreign Commerce, House of Representatives, Eighy-sixth Congress, first session, on H.R. 2316, H.R. 4163, and H.R. 4815, bills to insure effective regulation of D.C. Transit System, Inc., and fair and equal competition between D.C. Transit System, Inc., and its competitors. May 19, 20, 21, 26, June 2, 3, 10, and 11, 1959. (U.S. Govt. Print. Off, 1959)