6Araki H, Chai Y W. 2004. Fresh vegetable supply system at the Da-Zhong-Si wholesale market in Beijing: In the context of commodity chain analysis. Annals of the As- sociation of Economic Geographers, 50(3): 249-265.
7Bennett J. 1984. Political ecology and development proj- ects affecting pastoral peoples in east Africa. Land Ten- ure Center Research Paper, 80: 1-16.
8Birukawa S, Yamamoto S. 1978. Ecological system of vil- lage on the coast. Tokyo: Ninomiyashoten Press.
9尾留川正平,山本正三.1978.沿岸集落の生熊.东京:二宫書店.
10Blaikie P. 1985. The political economy of soil erosion in de- veloping countries. London: Longman Group Limited.
