Lipsey Richard G. <br/><br/>
An introduction to positive economics  / 
Richard G. Lipsey 
 - \\  5th ed. 
 - London:  Weidenfeld and Nicolson,  1979 
 - xviii.,827p.,  ill., 
<br/><br/> Includes Index 
<br/><br/><label>ISBN: </label>297775995 
<br/><br/><label>LC Class. No.: </label>HB 171