Domestic transportation : practice, theory, and policy / Roy J. Sampson and Martin T. Farris. Sampson, Roy J. Farris, Martin T., jt. aut. Transportation United States. Freight and freightage United States. HE206.2 .S25 1971 385 SAD Includes bibliographical references and index. Boston : Houghton Mifflin, 1971 1971 1971 Text x, 493 p. : eng United States. United States.