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  1. 01-01-1991 302 pages, illustrated, photos Studies in Technology and Social Change, no. 19
  2. 01-01-2000 This report is the culmination of the participatory approach to guideline development, in keeping with the basic, integrated philosophy of the Alternatives to Slash-and-Burn programme. 33 pages, tables
  3. 01-01-1991 Long-term agroforestry demonstrations trials using Acacia albida and other nitrogen fixing multipurpose trees/shrubs were initiated in mid-1982 to assess soil and crop productivity at a coastal lowland site characterized by low soil fertility, weed problems and consequent poor crop yields. 12...