Lipsey, Richard G. <br/><br/>
An introduction to positive economics / 
Richard G. Lipsey. 
 - 5th. ed. 
 - London :  English Language Book Society,  1979. 
 - 810 p. :  ill. ;  23 cm. 
<br/><br/> Includes indexes. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics--Study and teaching.