机译:影响华北地区采取农场牛奶安全措施的因素-从农场规模和生产类型的角度进行考察
Institute of Agricultural Economics and Development, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China;
China Academy for Rural Development, Zhejiang University, Hangzhou 310058, P.R.China;
International Food Policy Research Institute, Washington, DC 20005, USA;
School of Agricultural Economics and Rural Development, Renmin University of China, Beijing 100872, P.R.China;