1 Ranaweera, N. F. C.; Gunasena, H. P. M.; Senanayake, Y. D. A. (Eds.) 1998. Changing agricultural opportunities: The role of farming systems approaches - Proceedings of the 14th International Symposium on Sustainable Farming Systems, Colombo, Sri Lanka, 11-16 November 1996. Peradeniya, Sri Lanka: Asian Farming Systems Association (AFSA) xv, 477p.
(Location: IWMI-HQ Call no: 631 G000 RAN Record No: H026343)
2 Sabourin, E.; Tonneau, J. P.; Caron, P. 1998. Farmer's organizations and access to innovations: Pathways of socio-economic change in Massaroca, Bahia State, Brazil. In Ranaweera, N. F. C.; Gunasena, H. P. M.; Senanayake, Y. D. A. (Eds.), Changing agricultural opportunities: The role of farming systems approaches - Proceedings of the 14th International Symposium on Sustainable Farming Systems, Colombo, Sri Lanka, 11-16 November 1996. Peradeniya, Sri Lanka: Asian Farming Systems Association (AFSA) pp.140-147.