Cramb, R. A. 2015 “Busy people, idle land: The changing role of swidden fallows in Salawak In :Shifting Cultivation and Environmental Change: Indigenous People, Agriculture and Forest Conservation, M.Cairns (Ed). Earthscan from Routledge, New York, USA. Hollowell A. Irving. 1943. “The nature and function of property as a social institution”. Journal of Legal and Political Sociology. Keen, F. G. B. 1983. Land Use In Highlanders of Thailand, ed. J. McKinnon and W. Bhruksasri, Kuala Lumpur: Oxford University Press. Moore, Donald S. 1993. “Contesting terrain in Zimbabwe’s Eastern Highlands: political ecology, ethnography, and peasant resource struggles.” Economic Geography. Sajise, P.E. 2015. Biodiversity and swidden agroecosystems: An analysis and some implications. In: Shifting Cultivation and Environmental Change: Indigenous People, Agriculture and Forest Conservation, M.Cairns (Ed). Earthscan from Routledge, New York, USA. Siebert, Stephen F., Belsky, Jill M., Wangchuk, S. and Riddering, J, 2015. “The end of swidden in Bhutan: Implications for forest cover and biodiversity”, In: Shifting Cultivation and Environmental Change: Indigenous People, Agriculture and Forest Conservation, M.Cairns (Ed). Earthscan from Routledge, New York, USA. Van Noordwijk, M., Minang, P. A. and Hairiah, K. 2015. “Swidden transitions in an era of climate-change debate” In: Shifting Cultivation and Environmental Change: Indigenous People, Agriculture and Forest Conservation, M.Cairns (Ed). Earthscan from Routledge, New York, USA. ๗๗