Johnson, Emory R. <br/><br/>
Transportation :  economic principles and practices / 
Emory R Johnson, Grover Gerhardt Huebner and  G Lloyd Wilson. 
 - New york :  Appletion-century-crofts,  1940. 
 - 678 p. ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/>323  323 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Transportation--United States.
<br/><br/><label>Dewey Class. No.: </label>385 / J631t