Bigham, Truman C. 1896- Transportation : principles and problems / Truman C. Bigham ; Ed. Merrill J. Roberts - 2d ed. - New York : McGraw-Hill, 1952. - 710 p. ill. 24 cm. Include index Subjects--Topical Terms: Transportation.Transportation--United States. Dewey Class. No.: 388 / BIT 1952