Perraton, Hilary Basic education and agricultural extension: costs, effects and alternatives By Hilary Perraton...[et.al.] - Washington, D.C. IBRD 1983 - 285p. Paper - World Bank Staff Working Papers, No.564 . Subjects--Topical Terms: Education, BasicAgricultural EducationAgricultural Extension Dewey Class. No.: Z12 In8b