Richard G. Lipsey <br/><br/>
An introduction to positive economics  
/ Richard G. Lipsey, K. Alec Chrystal 
 - 7th ed. 
 - Oxford :  Oxford University Press,   1995. 
 - xxii, 808 p. :   ill. ;  26 cm. 
<br/><br/> Spine title: Positive economics<br/>7th ed originally published: London : Weidenfeld and Nicolson, 1989 
<br/><br/>Includes index. 
<br/><br/><br/>eng. 
<br/><br/><label>ISBN: </label>0198773994  TZS 10,000/= 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics<br/>International trade
<br/><br/><label>Dewey Class. No.: </label>330 LIP