Hayes, Samuel P. <br/><br/>
Evaluating development projects:   a manual for the use of field workers / 
Samuel P. Hayes 
 - Paris :  UNESCO ,.  1959 
 - 116 p. :  ill. ;  22 cm.  
 - Unesco. Technology and society series .
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic development<br/>Community development<br/>Research
<br/><br/><label>Dewey Class. No.: </label>338.89  / HAY-2