REFERENCES
- Collins , N. M. , eds. 1991 . The Conservation Atlas of Tropical Forests Asia and the Pacific. Simon and Schuster : IUCN . lpar;)
- Food and Agriculture Organization of the United Nations (FAO) . 1994 . Twenty-second FAO regional conference for Asia and the Pacific. Rome : FAO .
- Pei , Shengji and Jianchu , Xu . 1997 . “ Biodiversity and sustainability in swidden agroecosystems: problems and opportunities. ” . In Collected Research Papers on Biodiversity in Swidden Agroecosystem in Xishuangbanna Edited by: Pei , Shengji . 173 – 7 . Kuming, China : Yunnan Education Press . (in Chinese)
- Sajise , P. 1986 . “ The changing upland land landscape. ” . In Man Agriculture and the Tropical Forest. Edited by: Fujisaka , S. , Sajise , P. and Castillo , R. 405 – 34 . Bangkok, Thailand : Winrock International Institute for Agricultural Development . (in Chinese)
- Salzer , W. 1993 . Eco-economic assessment of agricultural extension recommendations for shifting cultivators in Northern Thailand. Doctoral dissertation, Hohenheim University, Germany
- Shen , Xu and Shuhong , Ma . 1992 . Laos Today. Chengdu, Sichuan Province, China : Sichuan People's Press . (in Chinese)
- Noulinh , Sinbandith . 1989 . “ Report on forestry activities. In ” . In Proceedings of the SUAN-EAPI-Exploratory Workshop on Lao Agro-ecosystems. Khon Kaen Thailand : Suan Secretariat, Khon Kane University .
- US Department of Justice, Drug Enforcement Administration, Intelligence Division . 1993 . Opium poppy cultivation and Heroin processing in Southeast Asia 21 – 2 . (Unpublished material)
- Yin , Shaoting . 1991 . A cultural-ecological system full of controversy: Slash-and-burn cultivation in Yunnan. Kunming, Yunnan, China : Yunnan People's Press . (in Chinese)