MÖSSBAUER SPECTROSCOPIC STUDIES OF IRON-SULPHUR PROTEINS WITH FOUR-IRON ACTIVE CENTRES D. P. E. DICKSON, C. E. JOHNSON, P. MIDDLETON, J. D. RUSH, R. CAMMACK, D. O. HALL, R. N. MULLINGER and K. K. RAO J. Phys. Colloques, 37 C6 (1976) C6-171-C6-175 DOI: 10.1051/jphyscol:1976636