Competitive absorption of transportation costs : Hearings before a subcommittee of the Committee on Interstate and Foreign Commerce, United States Senate, Eighty-first Congress, first session, on S. 236, a bill to clarify and formulate a consistent and coordinated national policy with respect to the tranportation costs in interstate commerce; to strengthen the antitrust laws of the United States and to provide for their more effective enforcement; and to promote competition by permitting sellers to have access to distant markets.