Shah, Vimal. <br/><br/>
Research desings and strategies 

 - New York :  Agricultural Development Council,  1972 
 - 21 p. 
 - Papers on survey research methodology .
 - Papers on survey research methodology .
<br/><br/><label>LCCN: </label>55851 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Investigación--Metodología.