Bingham,C.Robert. <br/><br/>
Economics :  principles,problems,and polies. 

 - 4th  ed. 
 - New york :  McGRAW-Hill,  1987. 
 - 429  p. ;    cm. 
<br/><br/>Index. 
<br/><br/><label>ISBN: </label> $ 
<br/><br/><label>Subjects--Topical Terms: </label><br/>economics.