Amelioration of soil by trees : guidelines for training in rapid appraisal for agroforestry research and extension Author(s) Abel, N. O. J. Drinkwater, M. J. Ingram, J. Okafor, J. Prinsley, R. T.
Strengthening of forestry and wildlife management project : Somalia : management plan for proposed national park, Barade district Author(s) Abel, N. O. J.
Zambia game management and habitat manipulation Author(s) Naylor, J. N. Caughley G. J. Abel, N. O. J. Liberg, O.
