Hay, William Walter,  1908- <br/><br/>
An Introduction to transportation engineering / 
William W. Hay. 
 - 2nd ed. 
 - New York :  John Wiley & Sons,  1977 
 - 652 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>0471364339 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Transportation.