1. Audric, J. (1972) Ankor and the Khmer Empire. London: Robert Hale.
2. Behan, R.W. (1975) Forestry and the end of innocence. Am. Forest. 81, 16–9.
3. Bodmer, R.E. and Ayres, J.M. (1991) Sustainable development and species diversity in Amazonian forest. Species 16, 22–4.
4. Bond, W.J. (1993) Keystone species. In Biodiversity and Ecosystem Function (H.A.Mooney and E.D.Schulze, eds) pp. 237–53. Berlin: Springer-Verlag.
5. Bosch, J.M. and Hewlett, S.D. (1982) A review of catchment experiments to determine the effects of vegetation change on water yield and evaporation. J. Hydrol. 55, 3–23.