17. Development Assistance and the Environment: Translating Intentions into Practice. 1989. M. Wenning. 18. Energy for Livelihoods: Putting People Back into Africa's Woodfuel Crisis. 1989. R. Mearns and G. Leach. 19. Crop Variety Mixtures in Marginal Environments. 1990. J. Jiggins 20. Displaced Pastoralists and Transferred Wheat Technology in Tanzania. 1990. C. Lane and J.N. Pretty. 21. Teaching Threatens Sustainable Agriculture. 1990. R.I. Ison. 22. Microenvironments Unobserved. 1990. R. Chambers. 23. Low Input Soil Restoration in Honduras: the Cantarranas Farmer-to-Farmer Extension Programme. 1990. R. Bunch. 24. Rural Common Property Resources: A Growing Crisis. 1991. N.S. Jodha 25. Participatory Education and Grassroots Development: The Case of Rural Appalachia. 1991. J. Gaventa and H. Lewis 26. Farmer Organisations in Ecuador: Contributions to Farmer First Research and Develop- ment. 1991. A. Bebbington 27. Indigenous Soil and Water Conservation in Africa. 1991. Chris Reij 28. Tree Products in Agroecosystems: Economic and Policy Issues. 1991. J.E.M. Arnold 29. Designing Integrated Pest Management for Sustainable and Productive Futures. 1991. Michel P. Pimbert 30. Plants, Genes and People: Improving the Relevance of Plant Breeding. 1991. Angelique Hangerud and Michael P. Collinson Copies of these papers are available from the Sustainable Agriculture Programme, IIED, London (2.50 each inc. p and p). GATEKEEPER SERIES NO. SA 30