Proceedings 

 - London :  Oxford University,  1963 
 - 567 p.  : ilus. 
<br/><br/><label>LCCN: </label>26339 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura--Aspectos economicos--Congresos.
<br/><br/><label>Dewey Class. No.: </label>338.1063  / C6Y 1961