A MÖSSBAUER STUDY OF THE IRON-CHROMIUM TYPE CATALYST FOR CO CONVERSION UNDER THE REACTION CONDITIONS Ding Ying-Ru, Yen Qi-Jie, Hsia Yuan-Fu, Yeh Shun-Hao, Chen Yi, Jin Yong-Shu and Qiu Jin-Heng J. Phys. Colloques, 41 C1 (1980) C1-341-C1-342 DOI: 10.1051/jphyscol:19801127