Purcell, Dennis. <br/><br/>
Agricultural extension and research :  achievements and problems in national systems / 
Dennis L. Purcell, Jock R. Anderson. 
 - Washington, D.C. :  World Bank,  1997. 
 - xx, 282 p. ;  28 cm. 
 - World Bank operations evaluation study .
<br/><br/>Includes bibliographical references. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0821338781 
<br/><br/><label>LCCN: </label>973416  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural extension work--Developing Countries--Evaluation.<br/>National agricultural research systems--Developing Countries--Evaluation.<br/>World Bank.--Developing Countries.--Evaluation.