Hay, William Walter,  1908- <br/><br/>
Railroad engineering. 

 - New York,  Wiley  [1953- 
 - v.  illus.  24cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Railroad engineering.
<br/><br/><label>LC Class. No.: </label>TF200  / .H38