1. Adams, R.H., 1996. Livestock income, male/female animals, and inequality in rural Pakistan, (Discussion Paper No. 21; International Food Policy Research Institute, Washington, DC).
2. Bennison, J.J., Barton, D. and Jaitner, J., 1997. The production objectives and feeding strategies for ruminant livestock owners in The Gambia: implications for policy makers. Agricultural Systems, 55, 425–444.
3. Bosman, H.G., Moll, H.A.J. and Udo, H.M.J., 1997. Measuring and interpreting the benefits of goat keeping in tropical farm systems. Agricultural Systems, 53, 349–372.
4. Deen, J., Martin, S.W. and Wilson, M.R., 1995. An evaluation of personal interviews as a method of estimating production indices on Ontario swine farms. Preventive Veterinary Medicine, 22, 263–271.
5. Donovan, D., 1997. Development in the local context. case studies from selected hamlets in five Northern provinces. In: D. Donovan, A.T. Rambo, J. Fox, L.T. Cuc and T.D. Vien (eds), Development Trends in Vietnam's Northern Mountain Region, vol. 2. Case studies and lessons from Asia, (East-West Center, Hanoi, Vietnam), 1–93.