Hayes, Samuel P.  1910 <br/><br/>
Evaluating development projects :  a manual for the use of field workers / 
prepared for Unesco by Samuel P. Hayes 
 - 2nd rev. ed.. 
 - Paris :  UNESCO,  1966 
 - 116 p. ;  21 cm. 
 - Technology and society series .
<br/><br/> The series formerly entitled 'Tensions and technology' 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label> USD 2.50 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Community development--Research
<br/><br/><label>Dewey Class. No.: </label>301.24