Basic education and agricultural extension : costs, effects, and alternatives /
Hilary Perraton ... [et al.].
- Washington, D.C., U.S.A. : World Bank, 1983.
- vii, 285 p. ; 28 cm.
- World Bank staff working papers, no. 564 0253-2115 ; .
- World Bank staff working paper ; no. 564. .