Papadakis, John. <br/><br/>
Agricultural research  : principles and methodology : suggestions... 

 - Buenos Aires :  El autor,  1970 
 - 88 p. 
<br/><br/><label>LCCN: </label>36872 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura--Investigación.