Feder,Gershon SlaDe,Roger H Sundaram,Anant K Training and visit extension system Analysis of operations and effects / Gershon Feder, Roger H.Slade and Anant K.Sundaram - Washingon,D.C World Bank 1985 - 36p. - World Bank staff working paper . Subjects--Topical Terms: Agricultural extension work - IndiaAgriculture