1. Appleton, J.D., Ridgway, J., 1994. Drainage geochemistry in tropical rain forest terrains. In: Hale, M., Plant, J.A. (Eds.), Drainage Geochemistry. Handbook of Exploration Geochemistry, Vol. 6. Elsevier, Amsterdam, pp. 341–378.
2. Christie, T., Fletcher, W.K., 1999. Contamination from forestry activities. Implications for stream sediment exploration programmes. In: 19th Int. Geochemical Exploration Symp., Vancouver, April, Symp. Progr. Abstr. Vol., p. 15.
3. Douglas, I., Spencer, T., Greer, T., Bidin, K., Sinun, W., Wong, W.M., 1992. The impact of selective commercial logging on stream hydrology, chemistry and sediment loads in the Ulu Segama rain forest, Sabah, Malaysia. In: Marshall, A.G., Swaine, M.D. (Eds.), Tropical Rain Forest: Disturbance and Recovery. The Royal Society of London, pp. 397–406.
4. FAO, 1993. Forest Resource Assessment 1990: Tropical Countries. United Nations Food and Agricultural Organization, Rome, 12 pp.
5. Exploration geochemistry in Southeast Asia: soils, sediments and potential for anthropogenic effects;Fletcher;J. Geochem. Explor.,1996