Hayes, Samuel P. <br/><br/>
Measuring the results of development projects: a manual for the use of field workers 
by Samuel P. Hayes 
 - Paris  United Nations Educational, Scientific and Cultural Organization  1959 
 - 100p. 
 - Monographs in the applied social sciences .
<br/><br/><label>Dewey Class. No.: </label>B136037 Un3m