Chan Patrick Au. <br/><br/>
Useful economics 

 - Ontario  Vantage Systems Canada          1990 
 - xviii, 276p  cm. 
<br/><br/><label>ISBN: </label>0969653107 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X, N0