Choice of agricultural technology; five methods for producing 

 - Rotterdam :  NEI,  1961 
 - 70 h.  ; láms. ; gráfs. 
 - Alternative techniques of production. Progress report  ; 6 .
 - Alternative techniques of production. Progress report  ; 6 .
<br/><br/><label>LCCN: </label>31887 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura--Costos.<br/>Agricultura--Innovaciones tecnológicas.<br/>Cereales.<br/>Mecanización agrícola.
<br/><br/><label>Dewey Class. No.: </label>338.1  / N4