Permanent frontier    illustrated history of U S economy in action 

 -  1966 
<br/><br/><label>Standard No.: </label>138,450 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ECONOMICS
<br/><br/><label>Dewey Class. No.: </label>Xv73:N7, K6