Lipsey, Richard G. <br/><br/>
An introduction to positive economics / 
Richard G.Lipsey. 
 - 5th ed. 
 - London :  English Language Book Society 1979,  1979. 
 - xxii, 810 p. :  ill. ;  26 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0297775995 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics--Study and teaching.