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Agricultural Extension. By A.W. VAN DEN BAN and H.S. HAWKINS. (Harlow, Longman, 1988, pp.328, £4.95 paperback)

Agricultural Extension Worldwide: Issues, Practices and Emerging Priorities. By WILLIAM M. RIVERA and SUSAN G. SHRAM, eds. (London, Croom-Helm, 1987, pp.294, £25.00 hardback).

Extension Science: Information Systems in Agricultural Development. By Niels Röling. (Cambridge, Cambridge University Press, 1988, pp.233, £35.00 hardback, £11.95 paperback).

Training and Visit Extension in Practice. By John Howell, ed. (London, Overseas Development Institute, Agricultural Administration Unit Occasional Paper 8, 1988, pp.107, £4.95 paperback).