Pergrum Dudley F. <br/><br/>
Transportation    Economics and public policy    
Pergrum Dudley F. 
 - Irwin Series in Economics .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Transport Economics  -- United States
<br/><br/><label>Dewey Class. No.: </label>X4:73:N6, K3