Gunawardana, A.M.T. Wickramasingh, M.L. Abeyratne, S.
Farmers' knowledge and perception of improved technology / A.M.T.Gunawardana, M.L.Wickramasingh, S.Abeyratne - Colombo Agrian research and training institute 1980 - 83 p. - Research study no.34 .
69163
631 / SRI
Farmers' knowledge and perception of improved technology / A.M.T.Gunawardana, M.L.Wickramasingh, S.Abeyratne - Colombo Agrian research and training institute 1980 - 83 p. - Research study no.34 .
69163
631 / SRI