El-Agraa, A. M. <br/><br/>
The theory of international trade / 
Ali M. El-Agraa. 
 - London :  Croom Helm,  1983 
 - 186 p. :  ill. ;  23 cm. 
<br/><br/>Bibliography : p.170-181 
<br/><br/><label>ISBN: </label>0709909179 
<br/><br/><label>Subjects--Topical Terms: </label><br/>International economic relations--Mathematical models.<br/>Commerce--Mathematical models.