THE USE OF CIRCULARLY POLARIZED MÖSSBAUER γ-RAYS TO DETERMINE THE SIGNS OF CO-EXISTENT HYPERFINE FIELDS J. M. WILLIAMS et J. S. BROOKSJ. Phys. Colloques, 35 C6 (1974) C6-693-C6-695DOI: https://doi.org/10.1051/jphyscol:19746155