HIGH FIELD N. M. R. IN Cu(NO3)2 2 1/2 H2O BELOW 1°K M. W. van TOL, M. MATSUURA and N. J. POULIS J. Phys. Colloques, 32 C1 (1971) C1-943-C1-945 DOI: 10.1051/jphyscol:19711338