摘要On January 24th,BASF Plant Science and the National Institute of Biological Sciences(NIBS)announced a cooperation and licensing agreement in biotechnology.It is
3Received date: 1999-11-02 MENG Xiang-jing1 , JIA Shao-feng 2 (1.Institute of Population Research, People’s University of China, Beijing 100872, China,2. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beiji.Current situation and trend of arable land change in China[J].Journal of Geographical Sciences,2000,10(3):28-34. 被引量:1