1. Bouwman, A.F.: 1990a, Global distribution of the major soils and land cover types, in: Bouwman, A.F. (ed), Soils and the Greenhouse Effect, John Wiley & Sons, New York, pp. 33–59.
2. Bouwman, A.F.: 1990b, Exchange of greenhouse gases between terrestrial ecosystems and the atmosphere, in: Bouwman, A.F. (ed), Soils and the Greenhouse Effect, John Wiley & Sons, New York, pp. 61–127.
3. Brown, S., Hall, C.A.S., Knabe, W., Raich, J., Trexler, M.C., and Woomer, P.: (this volume). Tropical forests: Their past, present,and potential future role in the terrestrial carbon budget.
4. Buringh, P.: 1984, Organic carbon in soils of the world, in: Woodwell, G.M. (ed), The Role of Terrestrial Vegetation in the Global Carbon Cycle,SCOPE 23, John Wiley & Sons, 247 p.
5. CAST: 1992, Task Force Report No. 119, Council for Agricultural Science and Technology,Ames, Iowa. 96 p.