Balassa, Bela. <br/><br/>
The "effects method" of project evaluation / 
Bela  Balassa. 
 - Washington, D.C.:  IBRD ,  1976. 
 - 24 p. ;  28 cm. 
 - World bank staff working paper;  no. 231. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics--Mathematical models.<br/>Economic surveys.