Hay, William W. An introduction to transportation engineering /$cWilliam W. Hay. - 2nd ed. - New York :$bWiley,$c1977. - xvi, 652 p., [2] fold. leaves of plates :$bill. Includes bibliographical references and indexes. ISBN: 0471364339 LCCN: 77009293 Subjects--Topical Terms: Transportation engineering.