Basic education and agricultural extension, costs, effects and alter natives / 
Hilary Perraton... [et al.] 
 - Washington, D.C. :  TheWorld Bank ,  1983 
 - 285p. :  tabs ;  27 cm. 
 - World Bank Staff working papers ;  no.564 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural extension work--Addresses, essays, lectures, etc.<br/>Mass media in Agriucltural extension work--addresses, essays, lect ures, etc.