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2. Keen, F.G.B. 1972. Upland Tenure and Land Use in North Thailand. Research Fellow at the SEATO Cultural Program 1970-1979
3. Keen, F.G.B. 1978. The Fermented Tea (Miang) Economy of Northern Thailand. In: Farmers in the Forest (eds. Kunstadter, P., Chapman, E.C. and Sabhasri, S.), pp. 255-270. University Press of Hawaii, The East-West Center.
4. Moriya, T. 1981. The Road of Tea (in Japanese). (守屋毅 お茶の来た道) NHK Books: 93-160
5. Miang: Fermented Tea in North Thailand