References
- Department of Health, 1978: Nutritional Table. — Nutrition Division, Ministry of Public Health, Bangkok, Thailand. 48 pp. (In Thai).
- Faculty of Environment and Resources Studies 1988: Report on Study of Resource Utilization Planning, A case Study of Songkhram Watershed, Upper Northeast of Thailand: 340 pp. — Mahidol University, Nakornpathom, Thailand. (In Thai).