MÖSSBAUER SPECTROSCOPIC STUDY ON THE MIXED AND AVERAGED VALENCE FERROCENE DERIVATIVES M. Watanabe, S. Iijima, I. Motoyama and H. Sano J. Phys. Colloques, 40 C2 (1979) C2-392-C2-394 DOI: 10.1051/jphyscol:19792136