Harrington, Larry. <br/><br/>
Methodological issues facing social scientist in on-farm 
/ farming system research 
 - México D. F. :  CIMMYT,  1980 
 - 33 p. 
<br/><br/><label>LCCN: </label>74018 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura--Investigación.<br/>Sociología rural.