Johnson, Emory Richard <br/><br/>
Transportation: economic principles and practices. 

 -  Appleton-Century Company, Inc.  [c1940] 
 - 678 p. 
<br/><br/><label>LCCN: </label>40009065  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Transportation--United States.