Feder, Gershon The role of opinion leaders in the diffusion of new knowledge : the case of integrated pest management / Gershon Feder & Sara Savastano - Washington D.C : The World Bank (WB) , 2006 - 34p. : ill. ; 26 cm. - Policy Research Working Paper No. 3916 . Subjects--Topical Terms: Diffusion of innovationinnovation Gov. Doc. Class. No.: UN WB PRWP-3916