Chailerd, J., Suksard, S., Hoamuangkaew, W. and Udomchoke, V. 2005. Evaluation of the Direct Use Value from Huai Thuem Watershed, Thong Pha Phum District, Kanchanaburi Province. Kasetsart Journal of Social Sciences. 26, 2 (Dec. 2005), 202–212.