6Mills, J A, Servheen C. The Asian Trade in Bears and Bear parts. World Wildlife Fund,Inc,Washington DC USA, 1991.
7Ma Yiqing. Conservation and utilization of the bear resources in China. Int. Conf. Bear Res. and Manage, 1994, 9(1):157-159.
8马逸清.亚洲的熊娄及其产品贸易.药用动物研究文集.北京:中国林业出版社,1993.51-58.
9Highley K, Highiey S, Bear Farming and Trade in China and Taiwan. In. The Humane Society of the United State lnd Humane Society International. Washington D C, 1994, 1-69.
10Ma Yiqing. The distribution of bears in Heilongjiang Province and changed in population density over a ten year period In: In proceeding of the first eastern asiatic bear conference on bear biology and their states, 1990.81-84.
