SHIELDING THE a.c. MAGNETIC FIELDS IN BITTER-TYPE MAGNETS N.E. Alekseevskii, G. Fuchs, M. Gliński et V. Gostishchev J. Phys. Colloques, 45 C1 (1984) C1-71-C1-74 DOI: 10.1051/jphyscol:1984115