Hansen, John R. <br/><br/>
Guide to practical project appraisal :  social benefit-cost analysis in developing countries / 
John R. Hansen 
 - New York :  United Nations,  1978 
 - 121 p. ;  24 cm. 
 - Project formulation and evaluation series ;  no.3 .
 - Project formulation and evaluation series ;  no.3 .
<br/><br/> At head of title: United Nations Industrial Development Organization, Vienna 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic development projects--Evaluation