Lipsey, Richard G. <br/><br/>
An Introduction to Positive Economics 

 - 7th ed. 
 - London  Weidenfeld and  Nicolson  1992 
 - xxii, 808p.:  ill. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0297795562 
<br/><br/><label>LC Class. No.: </label>HB171lip