Lipsey, Richard G. <br/><br/>
An introduction to positive economics / 
Richard G. Lipsey. 
 - 7th ed. 
 - Oxford :  Oxford University Press,  1993 
 - xxii, 808 p. :  ill. ;  25 cm. 
<br/><br/>Includes index. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0194424510 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics.<br/>Economics--Study and teaching.