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2. Kanzaki, M., Kimura, K., Kawaguchi, H., Sahunalu, P., Dhanmanonda, P., Tanpibal, V., Prachaiyo, B., Puriyakorn, B., Muangnil, K., Preechapanya, P., Thoranisorn, S., Yoneda,T., Sato, H. & Yoda, K. 1991a. Chapter 4. Biomass production and survival of trees planted in tropical waste lands in Thailand. In: K. Yoda and P. Sahunalu (eds.), Improvement of Biological Productivity of Tropical Wastelands in Thailand, 49-92. Osaka City University, Japan
3. Kanzaki, M., Dhanmanonda, P. & Yoda, K. 1991b. Chapter 7. Preliminary study on the transpiration rate of tropical tree species in Thailand. Ibid. 139-159.
4. Lal, R. & Stewart, B. A. 1990. Soil degradation: A global threat. In: Lal, R. & Stewart, B. A. (eds.), Soil Degradation, Advances in Soil Science 11: xiii-xvii. Springer-Verlag New York Inc.
5. Lal, R. & Stewart, B. A. 1992. Need for land restoration. In: Lal, R & Stewart (eds.), Soil Restoration, Advances in Soil Science 17: 1-11. Springer-Verlag New York Inc.