Ringwalt J. L. <br/><br/>
Development of transportation systems in the Unite 
Ringwalt J. L. 
 - New York  Johnson Reprint Corporation         1808 
 - 398p.  cm. 
 - History of American economy : Studies and materials for study .
<br/><br/> Reprinted : New York, Johnson Reprint Corporation, 1965 
<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:M8, B8.2