De Vries, C. A. <br/><br/>
Agricultural extension in the developing countries; a bibliography 

 - Wageningen :  International Institute for Land Reclamation and Improvement,  1968 
 - 125 p. 
 - International Institute for Land reclamation and Improvement . Bibliography  ; 7 .
 - International Institute for Land reclamation and Improvement . Bibliography  ; 7 .
<br/><br/><label>LCCN: </label>72216 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Extensión agrícola--Países subdesarrollados--Bibliografía.
<br/><br/><label>Dewey Class. No.: </label>630.717  / D4