THE FIRST SUPERCONDUCTING MAGNET FACILITY FOR MÖSSBAUER SPECTROSCOPY DEVELOPED IN CHINA Fang Guo Sheng, Cheng Guo Long, Li Su Su, Cheng Dar Yong and Yang William J. Phys. Colloques, 45 C1 (1984) C1-827-C1-831 DOI: 10.1051/jphyscol:19841169